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    Opinions requested for likely cause of water intrusion into cylinders (with pictures)

    Engine: Mercruiser 4.3L Reman I purchased a remanufactured engine online (I know...first mistake) and installed it onto my boat. Everything worked fine until about 15 hours of run time. I was coming off of plane and just as I got to idle a loud, rhythmic knock could be heard from the engine...
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    Delco EST igniter vs. Thunderbolt IV

    I've replacing my old 1995 4.3L that had a broken block with a 4.3L reman. The reman came with a Delco EST ignition and I've trying to figure out whether I should leave that on there or switch it out for the TBIV from the old engine that was fully functional on the old engine. I know the EST's...
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    4.3L Forward Lifting Eye?

    I just purchased a reman 4.3L to replace my 1995 4.3L. The aft lifting eye on my old engine won't fit on the new one since I'm going from a 12 bolt intake to an 8 bolt intake. I was going to purchase the new lifting eye but I can't find any reference anywhere for one that goes on an engine with...
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    HELP! Starter won't engage when I turn the key.

    I'm leaving for a week long fishing trip and was going to take the boat out one last time for a functional checkout. I turned the key to on and got the usual tone, but when I turned it to start the tone changed a little but the starter didn't react. I tried it over and over and messed with the...
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    Pressure test shows leaks behind the yoke assembly

    I was going to replace the O-ring and oil seal in the roller bearing stack up. Is there anything else I need to be looking for/checking?
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    Can't get Alpha one Gen II outdrive back on.

    I've finished servicing my entire outdrive and am trying to install it. It goes on a little ways then stops hard just short of the bellhousing bolts protruding from the upper unit. I have my control box in drive, the dog and shift shaft are lined up, and when I try to turn the prop shaft CCW...
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    Dimensions of gimble bearing install tool

    Can someone with a gimble bearing installation tool for an Alpha one, Gen II give me the dimensions of the tool (mostly the OD)? I ordered one but the contact ring doesn't seem to rest on the correct part of the new bearing. Thanks in advance.
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    Plastic in SEI lower unit?

    Re: Plastic in SEI lower unit? Ok, I did some looking around and found another piece of plastic on behind my prop in the lower unit. It appears to be the other side of the piece that I found earlier. I can't see how it's possible that this isn't part of the assembly.....but I can't find any...
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    Plastic in SEI lower unit?

    I replaced my prop this weekend to upsize to a 19P prop. When I pulled my old prop off, there was a hard piece of white plastic behind it. It was relatively flat though mangled, and approximately four inches long, two inches wide, and about 1/16" thick. The boat seemed to run ok on the water...
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    Trouble getting up on plane

    Boat: 1995 Wellcraft Coastal 210 Engine: Mercruiser 4.3LX Prop: Aluminum 14.5 X 17 RH 3 Blade Problem: I'm having a really tough time getting up on plane. Even with just two of us in the boat I'm still having to use WOT and trim tabs all the way down to FINALLY nose over onto plane. If...
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    Throttle cable slipped?

    Boat: Wellcraft 218 Coastal Engine: 1995 Mercruiser 4.3XL All last season I had been dealing with a tight throttle travel at higher end of throttle travel. This weekend as I was moving through the range where the throttle had been stiff, I felt something give way and lost throttle control...
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    No fuel to carb 4.3LX Mercruiser

    Engine: 1996 4.3LX Mercruiser Issue: After running like a champ on Monday, I tried to start the boat on Wednesday and couldn't get it to start. The problem is clearly that I'm not getting any fuel to the carb. I pulled the fuel pump and put 12V to with the intake end in a cup of water and...
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    I've decided to replace my 4.3LX....thoughts on with what motor to replace it?

    My existing engine is just falling apart and I've decided to replace it. It's a 1995 4.3LX mercruiser with a 4BB carb. I just bought a new SEI 1.81R outdrive so I'm going to stick with the same size engine. I was thinking about just buying a new crate motor and was curious if it would be a...
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    4.3L V6 Mercruiser Hydrolocked

    Re: 4.3L V6 Mercruiser Hydrolocked Well....I found from where all of the metal pieces in my cooling system were coming. Yikes.
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    4.3L V6 Mercruiser Hydrolocked

    Re: 4.3L V6 Mercruiser Hydrolocked Another question for y'all: These are pictures of my cleaned off manifolds. Should I try to salvage them or just replace them? There isn't much material between the water jacket and the exhaust port in some places.
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    4.3L V6 Mercruiser Hydrolocked

    Re: 4.3L V6 Mercruiser Hydrolocked Ok I removed the gasket remnants from the riser and the manifold. There appeared to be three layers to the gasket. Is that typical for this gasket? The faying surface of the manifold is in really good condition, but the same can't be said for the mating...
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    4.3L V6 Mercruiser Hydrolocked

    Re: 4.3L V6 Mercruiser Hydrolocked Great....thanks for the suggestion. I took the riser and manifold off the side I'm seeing water. I don't see anything glaring that would indicate the water is leaking through and down to the cylinder. What do y'all think?
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    4.3L V6 Mercruiser Hydrolocked

    Engine: 4.3L V6 0F586331 After replacing the outdrive, I hooked the muffs up and tried to start the engine. The motor has been sitting for a couple of weeks since the last time out so it was slow to start. I got it to finally start but dropped the throttle too quick and it puttered out. By...
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    What prop do I need (1995 Mercruiser 4.3LX, Alpha One outdrive 1.47 gear ratio)

    Hey guys. I was troubleshooting a low RPM condition on WOT and found out I have an outdrive with a much lower gear ratio than I thought it had (1.47 vs. 1.81), so I'm hoping for some advice on which prop I SHOULD be running. The details are as follows: 1) Performance issue you are trying to...
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    Question about pressurizing outdrive to check for leaks...

    My model of Mercruiser has a lube oil reservoir. Do I need to pull the hose off of the reservoir and cap it, would it be sufficient just to pinch it off, or should I leave the system as is to pressurize it?
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