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    2004 5.0 OSI-EF not going over 3000 RPM

    Ok, thanks. But if an impeller was broken or not pushing enough water through the pump. Then the engine would start to run over temperature and overheat. Which should trip the High temp alarm and sound a beeping alarm sound. Which it doesnt do. But, perhaps the impeller and temp sensor both...
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    2004 5.0 OSI-EF not going over 3000 RPM

    No, I have not replaced the water pumps impellers. The boat gives no indication of overheating unless the temp sensors are bad. This is a twin engine boat. Would one bad impeller, put both engines into slow mode?
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    2004 5.0 OSI-EF not going over 3000 RPM

    I have dual tanks. I have a few ball valves that were installed in the fuel lines by the mfg. So I am able to have the engines draw from separate tanks, both tanks, or 1 tank. I am leaning towards the engines are in Engine RPM reduction mode. Possibly due to a bad sensor. But, as I said both...
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    2004 5.0 OSI-EF not going over 3000 RPM

    I will check it out. Although, I believe timing and advance is all controlled by the ECM. also, these are twin engines. both engines having same issue. so, what would the odds be of both engines having a timing and advance issue?
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    2004 5.0 OSI-EF not going over 3000 RPM

    I have a 2004 Rinker 312, with twin 5.0L OSI-EF engines and ocean series duo prop drives with SS props. I took the boat out for my usual start of the season test drive. The boat, while at the dock, ran perfect. while in neutral, I was able to rev the engines all the way up to 5000 rpm. But, then...
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    2004 Volvo Penta 5.0L OSi engines w/ duo props not getting on plane

    Fuel pressure was check and it was 52 psi on both pumps on the high side at the fuel rail. If revved up both engines and it held with only a slight increase before returning to the 52 psi mark. Although, I did not check the pressure out on the water under a WOT load. Don't think it will...
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    2004 Volvo Penta 5.0L OSi engines w/ duo props not getting on plane

    ok, I can select how where the engines pull fuel from. I can have each engine pull from separate tanks or both pull from either the port or starboard tank. The boat has a sync meter at the helm. I did not look at it as I was going to WOT. But prior to that the throttles levers are even, and the...
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    2004 Volvo Penta 5.0L OSi engines w/ duo props not getting on plane

    Ok, But, im not quite sure its a fuel problem. I understand bad fuel will cause engine problems, as I had issues with stall fuel in small engines like my power washer, portable generator etc. but they usually just didnt start at all. My boat starts and the engines run smooth and sound perfect...
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    2004 Volvo Penta 5.0L OSi engines w/ duo props not getting on plane

    also, I had added about 30 gals of fresh fuel in Sept. there was about 15 gals of fuel left over from the previous year. So, not all the fuel is 1 1/2 yr old and as I said I do add in fuel stabilizers and other additives like stp fuel treatment or sea foam before the boat is decommissioned
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    2004 Volvo Penta 5.0L OSi engines w/ duo props not getting on plane

    ok but I can drive the boat around without any issues at slow speeds under 3000 rpm
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    2004 Volvo Penta 5.0L OSi engines w/ duo props not getting on plane

    If it is the fuel, wouldnt that cause the engines to sputter and misfire? they seem to run smooth as I travel around at no wake or slight wake speeds below planning speed.
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    2004 Volvo Penta 5.0L OSi engines w/ duo props not getting on plane

    I have a 2004 Rinker with twin 5.0L engines with ocean series duo props with SS props. At the end of last season, after not using the boat for most of the season, I noticed that the engines ran fine at no wake speed as I drove out to open water. But, once I throttled up to WOT, I felt a slight...
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    engines dont go full throttle

    I recently had to have one of my shift cables replaced and then adjusted as the shift levers were not aligned. Now, after the mechanic completed that task, it seems my boat will not reach full power. When I throttle up to go on plane, my engines are only reaching about 3300 rpm. (full throttle...
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    Fuel Pump Problems

    I have a 2004 Rinker 312Fv with twin Volvo Penta 5.0 OSI-EF engines and dual gas tanks. since the beginning of May i have been noticing that the boat is very sluggish on acceleration (runs perfect at idel and no wake speeds). As throttle up to get on plane the RPM's barely hit 4000 and it seems...
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    Port Engine starving for gas

    I have a 2004 Rinker 312 Fiesta Vee with twin Volvo 5.0L Ocean Series engines and outdrives. I have two 75 gal fuel tanks that has valves to isolate the tanks or merge them. I run with the tanks isolated, so that the port engine pulls from the port tank only and the same for the starboard...
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