3 mpi is overheating at 3000 rpm and above whe stopped and restarted cools down whilst - Answered by a verified Marine Mechanic We use cookies to give you the best possible experience on our website. Overheating issues are classified as ‘overheating engine mechanical,’ ‘engine overheats cooling system,’ or a combination of both. When testing for the first time in the water, It overheated, alarm went off. If you are running hot only at idle and not at low speed cruising then there is an airflow problem. Impellar need replaced? Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. I want to see the available 5. drops to what it should. Stop engine immediately, check the oil level Run engine only in emergency. sounds like a fan issue to me, just had to replace the relay and temp. I've never seen a tight stuffing box overheat an engine. ANY increase in rpm cools the engine. What could the problem be. Environment: Fresh water only – never in saltwater. 7 overheating IP: Logged Message: My 2001 Dakota QC 4x4 with the 4. I'm unsure what it could be. Jeep overheats when idle It runs great except for when I idle for more then 30 seconds the temp gauge jumps to 260+ degrees. If you have an overheating problem in traffic, keep an eye on your temperature gauge. If it overheats at idle, but is better at a higher speed, it almost always points to a water flow/pressure problem. 7 liter engines. From the outside, the hose looked fine. I see the temperature gauge go from the middle to hot. When I run the A/C then park my van, it slowly starts to overheat. Improper repair to a MerCruiser engine can render it unsafe or result in further damage. If the engine overheats only at a stop or idle ,Most front wheel drive cars will use an electric cooling fan motor located in front or behind the radiator. Mercruiser 5. It will redline, the check guages light comes on, and it starts spewing coolant. There are several reasons why a cars AC (Air Conditioning) may not cool when at a stop and blows cool only when moving. Smile - I'm well known for being so "verbos" !! Stop leak: It can work but will aggrevate the heat transfer ability of the system at large and be the cause of inadequate cooling - hence overheat which then causes the hair loss of more problems. I have HP DV6, with AMD Turion RM-74 and HD4650. Rough Idle When Starting Cold, Then Goes Away When Engine Is At Operating Temperature More Details Below I have an older, low mileage vehicle with a V8 engine. The following performed: Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. I have a 1997 Jeep Cherokee. That's when the truck began to overheat again, going all the way past the 3/4 mark. That could be the manifolds are corroded or it could be that the exhaust flappers melted off from the original overheating and are now blocking the. If you get excessive steam it may indicate a problem. I took it to 2 shops. If anything it will get hot and wear the packing prematurely. Engine Idle Overheat - You're seeking articles on our blog within the headline Engine Idle Overheat of choices of articles that we got. I have replaced the following parts: water pump, radiator cap, fan clutch, and the thermostat. Mercruiser 5. View online or download Mercruiser Sterndrive 5. Overheat only at idle keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. The only problem with taking temps readings is that the overheating is not. It has 50,000 miles. Problem: Engine overheats while driving down the road after a few miles. 0L MPI engine dying at idle RPM-gctid680244 cruising only about 50 yards at low RPM, the engine just died and I was drifting. 7L Alpha 1 Mercruiser Sterndrive. Plugs are good yes I pulled them and no white just slightly black from the carb being slightly rich at idle. The check engine light is not on. First, the pistons are made of aluminum, which has a very high thermal expansion coefficient. 7 Not rated yet I have a 1986 sea ray 230. I see the temperature gauge go from the middle to hot. Boats, Accessories & Tow Vehicles - Boat overheating at idle - Sounds like you have a vacuum leak somewhere. Pretty confident the impeller is working ok so i replaced the t-stat. That cannot be. Thats the short answer. I have an opportunity to buy a lightly used OMC Cobra with a 4. 0LX - Alpha - Overheat. 9 6cly 2wd Auto. Remove the manifolds if they appear clogged. Mercruiser 5. Overheating problem has been affecting various iPhone models from iPhone 6s and. it would be fine at idle for a few min, but anything else would overheat it quickly. INSTANTLY DOWNLOAD outboard repair manuals straight to your computer in seconds. Nope apparently it was one of the fuel pumps over heating. I have any issue that I am unable to resolve. That is the only time that it overheats - just at idle. Starts and runs great on land on the hose and then once on the water starts right up but after 10 min or so of low speed or at idle starts to run rough or stalls. 0L MPI engine dying at idle RPM-gctid680244 cruising only about 50 yards at low RPM, the engine just died and I was drifting. If you put anything but a blower style cooler in the first slot, the GPU will directly feed the chipset warm enough air that at idle the chipset gets to 70-75c at max speed (6300 rpm). The following information contains troubleshooting testing procedures for engine surges problems [i. 496 MerCruiser Engine Overheating 2001-2007 When a MerCruiser engine overheats, catastrophic damage to the engine will occur if the cause isn't repaired immediately. Turn idle mixture screw out (counterclock-vacuum leaks, etc. It is fine when cruising or at WOT, but at very slow speeds (slightly faster than no-wake, and at no-wake and idle), it overheats. My Car Overheats in Idle & Cools Down When Driving by Richard Rowe The good news is that your problem could only be one of a few things; the bad news is that the faults involved could have several causes, and you'll need to track the problem down before you can fix it. Mercruiser uses 70 degrees C. Engine overheating when at a stop or idle. overheating - often at idle/stopped 2. If the engine overheats a few minutes after start up, the most probable cause is a defective thermostat. ) Things replaced this weekend: 1) starboard/port exhaust manifold/riser elbow. Hello! I just got a mx5 (Miata) NA (1990) and I noticed that the voltage at idle is quite low, 12 - 12,5. Planetnautique. 7 - question Car overheats and Air. I have a 2005 Sportsman 500 HO and it is overheating after just few minutes of riding. Thoughts?. I took it to my mechanic for scanning and it didn't overheat at all. The answer to your propulsion needs. At idle it runs at around 50-60 degrees Idle, and under load it can reach anywhere upto 93-4 degrees Celcius. When it starts creeping into the danger zone, look under the hood to see if your electric fan is running. sounds like a fan issue to me, just had to replace the relay and temp. Mercruiser's technical bulletin recommends water at half-way valve open and idle at 1300 RPM until warm up. It takes be about 5 minutes to get back to the dock at idle. The longer answer is a clogged raditor fins with too many bugs stuck between the fins. the seals are in place to assure that only fresh air. I've just stripped the exhaust manifolds off the engine along with the risers to investigate the overheating problem. Then, as it warms up the choke opens and rpm increases you back off the throttle until it will run at idle on its own. I was on a 200 mile trip pulling my boat today and the truck started over heating (according to the dash) in trafic. It is fine when cruising or at WOT, but at very slow speeds (slightly faster than no-wake, and at no-wake and idle), it overheats. I replaced everything and still overheating at higher RPM's and realized that not enough water was comming through which also caused some steam. I also noticed that the idle was a little slow so I adjusted the carb so the rpm was between 800-900. I drove over 14kms to my home and the car temperature was normal. Mercruiser Thermostats, Housings & Gaskets, direct replacement water pumps, thermostats, impellers, heat exchangers and other Mercruiser boat parts. The gauge is going 3/4 of the way and the overflow tank is literally full of boiling fluid and waiting to explode. Consequently, I'd take advantage of the warranty now if you are inclined to do that. I'm having an overheat issue when I'm going above 3000rpms, no overheat issue while at idle speed, but almost immediate overheat as soon as I try to get on plane (over 3000rpm. Once I start moving again, it’s fine. Re: another Mercruiser overheat investigation « Reply #98 on: June 06, 2017, 10:59:02 AM » ok finally managed to find it - the ONLY model not listed in my clymer was the one I was working on - had to remove the whole manifold to get into the stat housing at the exhaust elbow -. Reason as at idle or even in gear idle is the lowest source of pressure. If you have an older engine you might have the old 3-piece exhaust y-pipe. While the car overheating, there is no smell of antifreeze, and no plume of smoke from the exhaust. I took the thermostat out to allow constant water flow. Measured my 106 drive and I am only getting 8gpm at idle?? Can you tell me what pump is in the 106 drive as Mercruiser uses a hi pressure, low volume pump in old model Gen l and a lo pressure , hi volume pump in Gen ll. was running 55lbs oil pressure. this item is in excellent shape (see pictures). i had the same problem with my altima it was a bad radiator and my fans were not turning on when the ac was on, so i got those replaced as well with a dedicated switch for them to turn on at all times. If the engine overheats after several miles of driving or only overheats at low speeds, you should inspect the cooling fan operation and radiator. 0 water pump was the. This past weekend while fishing the LSR Challenge, my main engine started running rough while trolling. New Mercruiser Sterndrives also have serial numbers. You've had yer shot and. If the engine overheats only at a stop or idle ,Most front wheel drive cars will use an electric cooling fan motor located in front or behind the radiator. All seems Ok for a while and then the engine temp rises really fast. To replace the shutters in the old 3-piece style t-pipe the engine will have to be removed. The radiator fan does not run at any point. It was the raw water intake hose which was collapsing on the inside. Fans are ok, both are coming up on their own, rad hoses are the same temp. Runs at correct temperature on the move. 6 Idle speed on EFI models is not adjustable. The only problem with taking temps readings is that the overheating is not. 3 liter and V8 5. Two basic things can cause too much steam. When testing for the first time in the water, It overheated, alarm went off. 0L TKS Alpha I (One) (135-hp) Inboard Whether you want to pull the kids around on water toys all day or host an all-day cruise on your pontoon, the 3. View and Download MerCruiser 350 MAG MPI Tow Sports owner's manual online. So we decided to play around with the idle (~8degrees) and all of a sudden the temp dropped below the half way mark (40%). com Car Forums!. I have one friend with a 350 mag who hads similar problems. I have a 2006 Sea Ray 240 Sundeck with Mercruiser 350 MAG MPI and Bravo 3 Drive. A water pump from a raw water cooled engine only looks like new when it is new. One old guideline says that overheating at highway speed is a coolant flow problem, overheating at idle is an airflow problem. Why would an engine overheat while driving but stay at same temp while idle?. 0, overheating at idle. By chance is it a Robert Shaw unit? The only DOA thermostat I ever bought was a Shaw. list your items fast and easy and manage. I also would checking the trans cooler is the right first step. My car has an automatic transmission. Overheating honda civic 2003 (vehicle, gasket, coupe, idle) User Name: You only get one shot at overheating an aluminum part on an engine. To summarize, at idle, no bubbles, at plane speed, (sorry, tach is broken) guessing 2000-2500 RPM, the bubbles are fast and furious. Loading hold on Loading hold on. 0 220hp Mercruiser with a 2 barrel carb. Temp is normal if at 1000 or above. Re: 87 Mercruiser overheating at idle (under 1000rpm) OK, I back flushed and then ran the boat with the muffs on and the supply hose off - dumping into the bilge. Overheating during extended idle. My first test would be to drive the car to get it thoroughly warmed, then parking it at home, setting up the biggest fan that I have (which happens to be a really big one) blowing directly into the grille, letting it idle, and see if it overheats. I have an oem fresh water cooling FULL kit on and have the right thermostat all parts come directly from indmar. Overheating at idle - PlanetNautique Forums. I'm having overheating issues with my new 1. I didn't have my lazer therm gun with me to check the tstat, hoses, risers and block to see if it is really getting hot or just a bad sensor. This is due to the fact that ALL the water used to cool the engine has to eventually exit through the risers. Now overheating again. Generally they can do so at high enough quantities that the vehicle does not need to move to exchange enough heat from radiator to the atmosphere to assure. My Car Overheats While Driving. When the alarm sounds it's around 170 on the smart craft guage then drops to 130 or so when I trim it up. runs cool at higher rpms in fact if it starts to climb when trolling 2. I was sold that a blown head gasket from the overheating allowed the water to enter #7 prior to overhaul. He just might save your weekend on the. Have added some coolant but not a lot. This compensates for the inevitable decrease in cooling capacity that results from the normal buildup of dirt on the heat transfer surfaces. It was the raw water intake hose which was collapsing on the inside. 454 mercruiser idles rough at low rpm Idles rough at low rpm, runs great at high rpm - Mercury Marine Mercruiser 350 - 454 - 5. Keep in mind that there may be more than one reason a 4. For few months there is a problem with the cooling system. View online or download Mercruiser Sterndrive 5. What would cause the car to overheat at idle and lose cabin heat, but run fine at speed and make cabin heat?. Installed my new long block into my 4. my ski buddy's boat started overheating at slow or idle speeds last year. 3 overheating cause mercruiser 4. Not to mention I've had the system flushed. This occurs with the heater on, heater off or AC on. It sounds when i shut off the boat. I cleaned and re-did the thermal paste and it really fixed the overheating. 7 - question Car overheats and Air. 1973 - 1979 F-100 & Larger F-Series Trucks - 78 f150 Overheating at idle only. I have one friend with a 350 mag who hads similar problems. Keep in mind that there may be more than one cause to an overheating issue. I just replaced my coolant last month and oil is new as well. This over heat problem with the overheat alarm going off has just started the last two times I had it out, the temp gage also said that it is hot. Besides a new radiator on ebay is only like $75 I believe and its jus nice to have lol. If it reads no more than 160 on the block why do you think that its overheating? I use the area right next to the temperature tube at the rear of the head to check temperature. Mercruiser WOT RPM Chart Boat Engine Brands » Mercruiser Stern Drive Models » RPM Range Chart. light three times, once at full tilt, once at cruise, and once at idle, on two seperate trips. Re: Mercruiser 4. 0 MPI overheating at idle only June 23rd, 2016, 07:25 AM Engine # 0w339318 Drive # 0w584139 Boat never operated in salt, total hours on engine are around 250, hour meter states 350 hrs but shop who replaced drive left key on for over a week and a half an killed both batteries and caused meter to count non running hours. 1987 - 1996 F150 & Larger F-Series Trucks - Overheating only at highway speeds - I have 1990 F250 with a 5. It will overheat only when parked in my garage while idling, after I drove for a while. Mercruiser 5. I was sold that a blown head gasket from the overheating allowed the water to enter #7 prior to overhaul. You have the heads off so at least look at an intake valve but all caution sport - saving only $110 for marine work some is easier some aggravated by harsh use, fresh or ambient water cooled issues plus improper off season storage as applicable. Thermostat was replaced same issues. Scotty Kilmer 574,210 views. my thermostat only cost me about 12 bucks, and took about 5 min to install. The service manual, also referred to as a repair manual, shop manual or workshop manual, covers every aspect of repair. Turn idle mixture screw out (counterclock-vacuum leaks, etc. With some cars, the onboard computer automatically revs the idle speed slightly when accessories are running, and you won't get a true idle speed if they are at work. the little. Hi all, I have a '98 Forester with a EJ22 engine from '96 Legacy swapped in. thermostats to prevent serious corrosion problems during the 12 months warranty. Fans are ok, both are coming up on their own, rad hoses are the same temp. 5 and it comes right down. 0 mercruiser mpi; alpha 1 3. What Is The "high" Normal Temp Fro A 454 At Idle?? My electric fan doesn't come on until 205. New compound has been applied bi-annually on this. 0 lb to 20lb if pressure from idle to 3500 rpm. Click on the search above and search the '53-'62 Forum for cooling, radiator or overheating and you will get a few threads where this has been discussed. Q: When I accelerate car does not overheat but only when I'm in idle. Idle to about 2600 rpms the temp is ok. The patches didn't accomplish much: "The car cruises at 210-215 degrees and is even hotter at idle. A water pump from a raw water cooled engine only looks like new when it is new. How to Shift Your Boat. 2, 2006 overheats at both idle and speed. you will get the complete package. 3L V-6, the 4. 4 L 200HP powerhead on a 1993 midsection/exhaust plate assembly from a 150 XR6. Nope apparently it was one of the fuel pumps over heating. As Bbp said let's run her on the trailer and determine a different source, and see what comes out the drive. If it isn't than that is your problem ( idle and low speed overheating ). 7L Marine Engine Specifications | Pricing. Mercury MerCruiser. What would cause a 1996 Jeep Cherokee to overheat in idle and the fan not to come on if the water pump and radiator are only two years old?. Engines typically overheat because the coolant’s low, so topping it off will usually solve the problem. Hope this helps. Hi all, I have a '98 Forester with a EJ22 engine from '96 Legacy swapped in. In my car there's a thermostatic switch that only turns the fan on when the engine is getting pretty hot (just before the temp gauge reaches red). Car overheats at idle, but cools when moving? My car started overheating while I was stuck in traffic, I tried revving the engine a bit to see if it would cool it down but it didn't. org: an open forum dedicated to the discussion and debate about our beloved sports car the DeLorean, its maker, and anything interesting in-between. Nope apparently it was one of the fuel pumps over heating. Set = IMA Sensor and Fault Monitoring Enabled. To replace the shutters in the old 3-piece style t-pipe the engine will have to be removed. as for the mechanical fan and fan clutch, if it is the clutch is going bad and the fan is not spinning then you would also get your basic engine coolant overheat condition when not moving. Most cars have fans, either electric or mechanical, that force air through their radiators. Solving Overheating Problems (in the right side of the carburetor near the idle jet) is the right size. Keep in mind that there may be more than one cause to an overheating issue. I'm having problems with my 1992 MerCruiser 4. Consult your Authorized Mercury MerCruiser Dealer before attempting this procedure. When i drive at highway speeds, everything functions normally. could you check your world of warcraft folder , there is a file called "WTF" inside it , open the config. 6 Idle speed on EFI models is not adjustable. Sometimes while idling around I get a overheating alarm if the motor is trimmed all the way down. 3lx mercruiser, 205hp. Looking for some help tracking down a low water pressure and overheating problem. Hi i got a Asus k53sv with I5 processor, and i clean it regularly last time i think 3 month ago also i change my thermal paste. This article’s focus is to explain the many reasons why a MerCruiser overheats. Measured my 106 drive and I am only getting 8gpm at idle?? Can you tell me what pump is in the 106 drive as Mercruiser uses a hi pressure, low volume pump in old model Gen l and a lo pressure , hi volume pump in Gen ll. Starts and runs great on land on the hose and then once on the water starts right up but after 10 min or so of low speed or at idle starts to run rough or stalls. Any suggestions, any info would be appreciated. Ever wonder why your boat is overheating? Just take a few minutes and listen Justin from SkipperBud's of Madison, WI. Overheating after 15-20 minutes sure sounds like the impeller. When attempting to diagnose an overheating MerCruiser 5. My car broke down because it was overheating. 4 A special procedure must be followed to check or adjust timing. I've checked the water flow from the drive pump, and it seems equal. While I drove back the car from the workshop, the outside temperature was about 38C degrees. Engine Overheating: Mercury Johnson Evinrude Yamaha Suzuki Mariner MerCruiser DOWNLOAD outboard or inboard marine repair manuals straight to your computer in seconds —fix your problems now. In case this is not the problem well, the main culprit seems to be the card. If it's only 3 months old it shouldn't need the thermal paste replacing, and in any event doing so could void that warranty you mentioned. With some cars, the onboard computer automatically revs the idle speed slightly when accessories are running, and you won't get a true idle speed if they are at work. I am selling a MerCruiser Volvo 12 volt ignition coil, part numbers 907 / 611. While driving at highway speeds, the temp indicator stays at halfway (even in 102 degree F ambient temperature). It will redline, the check guages light comes on, and it starts spewing coolant. My 2001 PT just recently started overheating during idle. Just an idea from some expensive. Got an estimate from Mercruiser that water flow should be about 15GPM. My Car Overheats While Driving. 2, 3 water pumps a fan clutch and shroud for a 3500 v-10 and still had the prob, so i swapped for an aluminum 2 row radiator (original is a single row raditor that doesnt get the job done) from jegs that was meant for a first gen camaro and a 1700cfm electric fan and i drove all summer with ac on and 0 overheating, only hard part was fabricating the brakets. I'm having problems with my 1992 MerCruiser 4. 2 mpi horizon, Mx 6. I changed the fan relay so the fans do kick it. 3 mercruiser mli overheating 5. Second: If no coolant leak or low fluid level is present, then determine when the overheating complaint occurs. Rough Idle When Starting Cold, Then Goes Away When Engine Is At Operating Temperature More Details Below I have an older, low mileage vehicle with a V8 engine. Scotty Kilmer 574,210 views. Why would a car only overheat when driving on highway not when driving around town? 129 130 131. I believe they used a 5/8 to 3/4 inch dia. checked the gas tank it was full so then hit the valve on the fuel rail had a little air come out then fuel took it to two mechanics one said fule pumps went bad other said had no idea. Ever wonder why your boat is overheating? Just take a few minutes and listen Justin from SkipperBud's of Madison, WI. Still, I only have couple hours on the engine since it was rebuilt, so I can not say for sure that #7 is now dry. 350 small block knock at idle rpms; Now, if i let it idle long enough, it will overheat to about 220-225, but only gets up to around 240-250 at highway speeds. ECT overheat ECM memory Multiple CAN Circuit faults Engine oil pressure NOTE: Excludes 6. The cooling system for the Chevrolet 350 engine consists of a water pump, a radiator and a thermostat. In some cases it doesn't close anymore, in others it refuses to open until the cooling water reaches boiling temp. Outboard boat motors are notorious for problems. 7 - question Car overheats and Air. This occurs with the heater on, heater off or AC on. A hot engine is more likely to suffer spark knock than one which runs at normal temperature. 0 w/about 75 hrs on my SeaRay Sundeck. I have a 79 Sea Ray with a 470 Mercruiser. **overheating at idle !!!!! help !!!!!. Finally solved the overheating in the 5. Consult your Authorized Mercury MerCruiser Dealer before attempting this procedure. drops to what it should. Hi all, Looking for the usual good advice. Sold at 12 $ From the estate of a retired boat mechanic. The following performed: Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. 5 and it comes right down. 0L Newbie: Overheating only under load? By RaysnCayne, November 6, But it seems like it'll happily idle at 200 until it runs out of gas. Remove the ports and visually inspect them for deposits that would restrict the water flow. They share many similarities. If it runs ok at low speeds and overheats at higher speeds its usually clogged risers. It doesnt rise quite to the H but pretty close. Some head gaskets only have water passages on one end of the gasket. I took the thermostat out to allow constant water flow. which is another way to either fix a rough idle or prevent a future one. Consult your Authorized Mercury MerCruiser Dealer before attempting this procedure. On low RPM (idle) after the engine has warmed up the water telltale is on and off and there is no uniform stream of water out of it. If the engine overheats a few minutes after start up, the most probable cause is a defective thermostat. I am having overheating issues as well, coupled with the fact that the cabin heat can also be wonky at the same time. Oh yea I replaced the the temp sensor. I run about 16. I've found that sometimes I can rev the engine up to about 2K RPMs and it will drop back to the middle of the road, but not always. i ran the boat in my pond for 20 minutes with no problems. 7L V8) is overheating while idling or driving slowly in traffic. When I run the A/C then park my van, it slowly starts to overheat. checked the gas tank it was full so then hit the valve on the fuel rail had a little air come out then fuel took it to two mechanics one said fule pumps went bad other said had no idea. Engine overheats at dead idle 600 rpm. 2 mpi, Mx 6. I believe the water hose that goes from the bellhousing to the transom is the smaller diameter. Use is in Lake Michigan. I've just bought a second hand mercruiser seacore engine, 5. They can answer questions for any Yamaha outboard model or horsepower. A lot of the newer plastic ones will break loose of the shaft, at idle the vehicle will overheat like crazy, and then when you pull off and drive, I assume the centrifugal force and higher rpms helps spin the impeller even though its not 100% connected. Good evening, I have a 2001 Crusader 5. 9 6cly 2wd Auto. To be more specific: when running cruise and wot the temp is steady 71-73 degrees C (160-165F) but when returning at the dock and idles the temp raises till 85-88C. check the risers to see if their clogged, a general rule of thumb is if it overheats at idle speeds but runs ok at higher speeds its the impeller. I replaced everything and still overheating at higher RPM's and realized that not enough water was comming through which also caused some steam. Repairing overheating issues requires inspection and testing of both mechanical and cooling system parts. It is the carb version, not the EFi version. Dad is a mechanic, said it was the thermostat problem because the old one had a "shiny" scratch, apparently. 7L Marine Longblock Options in the 6 Idle speed on EFI models is not. 7L V8) is overheating while idling or driving slowly in traffic. If the temp keeps climbing to the point where it tells you "A/C off for engine protection" or "Engine hot - idle engine", or your guage passes the 3/4 mark, pull over immediately, let the car idle for a minute and shut it off. Engine Idle Overheat - You're seeking articles on our blog within the headline Engine Idle Overheat of choices of articles that we got. Authorized dealer with large inventory, great prices, fast shipping!. 0L TKS Alpha I (One) (135-hp) Inboard Whether you want to pull the kids around on water toys all day or host an all-day cruise on your pontoon, the 3. In stock form, other than some gauges and a power program that added about 100 crankshaft horsepower and roughly 180 foot-pounds of torque, there was no disappointment with the power – it was awesome!. Overheating during extended idle. Symptoms - Beginning at the end of last year’s boating season here in Middle Tennessee, the engine temperature at the gauge 5. more random overheating happening while driving 6. 0 w/about 75 hrs on my SeaRay Sundeck. A downloadable repair manual is a digitally delivered book of instructions providing step-by-step repair procedures, maintenance and a troubleshooting guide. If it almost reaches red on the gauge but then the fan kicks in and brings the temperature back down then it could just be working as expected posted by amcewen at 2:09 AM on May 21, 2006. 7L Marine Longblock Options in the 6 Idle speed on EFI models is not. Hello! I just got a mx5 (Miata) NA (1990) and I noticed that the voltage at idle is quite low, 12 - 12,5. It was a surprise so I pass it along. Basically, my car is overheating a bit over the 3/4 mark. For few months there is a problem with the cooling system. My chevy equinox keeps running hot at idle. To summarize, at idle, no bubbles, at plane speed, (sorry, tach is broken) guessing 2000-2500 RPM, the bubbles are fast and furious. I recently had a problem with the 302 in my 1972 Bronco overheating at idle after it had not been started for several months.