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    Rought start idle

    Carb was rebuilt trying to find a solution to the issue.
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    Rought start idle

    The idle mix screws where adjusted prior. Are you referring to the one at the throttle linkage?
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    Rought start idle

    Maybe someone could help me understand what is causing this rough idle on start on a 5.7GS 2001 Wellcraft. So far i have replaced distributor cap, rotor, plug wires, spark plugs, coil, fuel pump, fuel filter and rebuilt the carb....no change. Boat starts fine but until you give it throttle the...
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    No thermostat, overheating

    Boat has a thru hull cooling the PS and the impeller. Pump moves water to the engine at a decent level. Risers and manifolds are new as well. Thermostat is new as well 140°. It was removed and tested in hot water and it operates as it should. The hose feeding the thermostat housing is cool and...
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    No thermostat, overheating

    That is where i am coming up blank. I removed and replaced the impeller and replaced the impeller housing 2 times. Removed and cleared all the hoses. Removed, opened the back plate and re-installed the engine circulation pump. Flushed the engine for 20 minutes. Removed therm housing and ran it...
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    No thermostat, overheating

    Engine with overheating issue. 5.7GS The thermostat along with impeller replaced. The engine had an overheating event and it looks like things might not be very good over the horizon. I removed the 140 therm and engine will run at 175 at idle. All of this is on a hose hook up not via muffs. By...
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    Gurgling coming from exhaust

    I am slightly concerned by a possible blown head gasket or warped heads after the overheating event. Everything else is clear. No obstruction to the new risers and manifolds. Impeller and pump are clear and it seems i have gotten all the broken impeller parts out. I checked and flushed all the...
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    Gurgling coming from exhaust

    Yes, hose connections are accurate
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    Gurgling coming from exhaust

    The test was at sea
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    Gurgling coming from exhaust

    It has a similar connection with a transom hook up. Both have been disabled to rule out air...
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    no speed then back to full speed

    Yet to be determined due to an overheating issue while at sea. Once the issue is resolved i will post back.
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    Gurgling coming from exhaust

    New pump housing has been ordered this morning to test that theory. The overheating is at idle and on and off at high rpms while static. No clear indication why the new impeller was shredded to beggin with. Another VP impeller was installed as i am not a fan of the cheap very flexible ones...
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    Gurgling coming from exhaust

    Update, still no indication and it has gotten worse. The riser and manifolds are new both sides. When the manifold inlet hose is removed after the engine is warm you get a lot of pressure coming out of the hose into the thermostat housing. So far tests have been done at the marina in the water...
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    Distributor alternatives

    Any recomendations on any other efi system that might work. I have read mixed feelings about the holley EFI. My replacement, if any, is a long way ahead so for the time being i am doing reading and research.
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    Distributor alternatives

    Part of the reason why i would like to upgrade is that i am planning on going Holley EFI over the winter and dump my carb. I am done with carbs
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    Distributor alternatives

    Thank you folks, i wanted to upgrade little by little since it will be and investment. Either way the boat will be out of use for a while for other issues so might as well toss that into the mix.
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    Distributor alternatives

    2001 Wellcraft with 5.7gspefs engine with a points distributor. After a visit to the mechanic due to backfiring and some other issues. The mechanic said that the dist was bad. He went into detail but i did not proceed with the dist replacement and brought it home. I personally am not a fan of...
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    5.7gs low oil pressure

    Appologies, i meant to say 40-45
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    5.7gs low oil pressure

    As a follow up to this post. I checked with a manual gauge and it tested great. It looks like the sender i had changed was either faulty or innacurate. I purchased another sender and installed. The current reading is 50 to 60 psi at idle.
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    Gurgling coming from exhaust

    That is the issue..boat is not pulling water on muffs. I have put 3 types of muffs and minimal water makes to the lower hose on the impeller housing. I even taped the last set of muffs and that is the only way to get a steady stream out of the impeller. When engine overheated i was about 200 to...
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