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    Mrecruiser 4.3 Intake vales #3 and #5 leaking after replacing valve seals

    I just finished up replacing valve seals in a 4.3 mercruiser with balancing shaft and efi. (first time) When replacing the seals I would bring the cylinder I was working on to top dead center then put 50psi of compressed air. The problem I'm having is with #5 and #3 cylinder intake vales.When...
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    Compression and Leak down test anaylsis

    I performed a compression and leakdown test on my 4.3 mecruiser engine. The engine blows smoke on start up and when in gear idling. It only used 1/2 quart of oil in 60hrs.. Below are the results. I'm going to change the gauge on the compression tester. It seems that the motor is getting tired...
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    Mercuiser 4.3 smoke coming from propeller

    I have a 4.3 mercruiser with EFI which has smoke on start up and coming from propeller when running. I'm burning some oil but not an excessive amount. I'm running 4 quarts of Rotella 15-40 oil with a quart of lucas oil stabilizer. I took the plugs out for a compression test and they are wet...
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    4.3 Mercruiser smoke from exhaust on compression test

    4.3 mercuiser with EFI. I had the heads off due to water infiltration. Put boat back together and it now blows smoke. I retorque the heads after 20hrs and decided to do compreesion test with the exh maniflolds off. I noticed that the cylinder that I was doing the test on would blow smoke...
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    4.3 Mercruiser EFI when slowing down to idle beeps and motor sometimes stalls

    I'll be coming in to to the dock and shift in to neutral at 1500 rpms and motor will beep and sometimes stalls. The motor purrs at idle wen it's stated and idles at 850rpms. Not sure why this is happening.
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    4.3 Mercuiser Hard Strating when Warm

    The motor starts perfectly when cold, if idling on muffs for twenty minute boat still starts fine. If running it hard for a few minutes the motor cranks real slow then starts up. I have a mp4 but can't attach it. Any ideas.
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    Oil leak coming from intake manifold 4.3 Mercruiser

    I installed the intake manifold of my 4.3 mercruiser. After I ran the motor for twenty minutes the a oil appeared from the rear gasket which the one where you have to use rtv silicone to from the gasket. I also noticed that the bolts where loose. I tightened them up and still had the leak...
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    Moisture in oil cap

    I ran the boat on the trailer in the lake to make sure everything was running ok. I noticed when I took the oil cap off I notice white film under the cap. There wasn't any water on the dip stick. Ran the boat out of the water with muffs on and noticed moisture under the oil cap. see...
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    Where does Hose from Disributor go?

    I have a2000 mercruiser 4.3 and the distributor cap has a plastic 90 degree fitting. Like an idiot I took the distributor and manifold off the boat and forgot what hose was attached to the distributor cap. see attached picture. Any ideas? Thanks
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