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    Mercruiser 3.0 LX spark plug failure

    So I have a 3.0 LX and I was 13 miles offshore when the engine lost 500 rpm and a very loud clatter begun. We killed the engine and use the ancillary to get back only to find something that I have never seen in my life before. The local Marine Engineer installed short reach delco MR43T instead...
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    2020 F4MH which carb to convert to 6hp

    Hi all, I have the above engine and would like to convert to 6hp I’ve done some reading and all that is required is the Mercury 6hp carb but I also read that a 6hp Tonhatsu carb will do the same job at a lesser cost. Can anyone enlighten me as to which carb I need to buy please ? My engine...
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    3.0LX - Mercarb to Rochester ?

    Hi all I’m thinking of buying a Rochester 2 bbl as a spare carb due to the boat being in a remote location. I’m told by the vendor that it’s a direct replacement. Is that true ? is my idea sound or am I asking for any trouble ? many thanks
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    Does this sound normal ?

    Mercruiser 3.0lx Alpha one gen 2 whilst I’ve been working on something in the engine bay this sound from the coupler area caught my attention and I wanted to ask if it sounds normal ? almost sounds like a diesel - engine runs nice and quiet, all this noise comes from the transom area. Uploaded...
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    Urgent help - nearly broke down at sea. Fuel Problem.

    Hi all, the urgency surrounding my issue is that our boat is in Greece which has little or no off shore support. The boat is safely at anchor on a small beach and the issue we experienced needs fixing ASAP as we fly back in 4 days and need to get the boat to a permanent mooring within this time...
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    Shift Interrupt causing engine cut out in bit forward and reverse.

    Hi All, recently had the lower shift cable replaced on my 1994 3.0 LX with gen 2 drive. All worked well for a few trips then got the cut out issue in both F and R. I have added a video of the shift plate and switch so you see the issue clearly...
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    What can cause this to shift bellows ?

    Hi all, disaster averted. foind the shift bellows on my A1 Gen 2 in a bit of a state. They were newly installed last season. what can cause this to happen to one year old bellows ? It must have happened last year as we were getting water in the engine bay and couldn’t understand why till now...
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    Mercruiser 3.0LX Bogging down at 2K rpm ?

    Hi All, I have a 1994 3.0LX fitted with a 2bbl mercarb. When pushing to 2000 rpm the engine bogs down and stalls. She idles just fine, everything as normal until I hover over 2000 rpm and she bogs and stalls. Now if I push past 2k rpm to 3k rpm she pushes through without stalling. She has had...
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    3.0LX bogging down in Greece

    Hi all i got the boat over to Greece, first week she has been fine but today when trying to get out of the hole she bogged down. tried a few times to no avail then remembered I had left a primer bulb in line with the fuel pump. I pumped it a few times, she bogged down once more then she flew...
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    Fuel Sender Reads 1/4 full when Empty ?

    Hi All. I have a capri 1850 SS 1994 and the OEM sender went bad so I replaced it with a universal one from Osculati. https://www.osculati.com/en/11572-27.160.00/fuel-level-indicator I adjusted the depth to be the same or simillar to the OEM one by removing the lower section and attaching the...
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    Desperate for help with timing problems on 3.0

    Good evening all I’ve been working every night on this boat until 11 o’clock at night after a full days work the problem we are having is that initially we could not get the engine to go into base timing mode while connecting the jumper between the two white Leeds on the distributor with the...
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    Nose blown of new aftermarket starter 3.0l

    Hi all just finished installing an new head on my LX and went to start it and it started nice then stumbled. I went to restart it started and then all of a sudden there was a clatter the engine stops and would not rotate when the key was turned on the ignition giving me very bad worries further...
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    Merc 3.0 rocker stud lifted - repair advice ?

    Hi all further to my stuck valve issue we found that the stud for the rocker in pot 5 was torn upwards by 3/8 inch we applied 40 ft ib to it and it doesn’t hold. we will need to extract it and find a way to refix it to its hole. the engineering shop suggested knurling it and loctite back in...
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    3.0LX Base Timing Question

    Hi All, I was trying to set the timing on this motor the other day. What I did was I verified pot 1 TDC using the finger in the plug hole technique for firing stroke, then fond the notch in the crank pulley was visible so I marked it white. I then connected a jumper wire between the 2 white...
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    Engine running check - look ok ?

    Having adjusted the throttle cable and set the idle I just wanted to post this and see if everything looks as it should before hitting the water. in tje video I have adjusted or am in the process of adjusting the idle / cable to the carb. how does she sound ? https://youtu.be/myjJ5imURO4
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    3.0LX throttle cable adjustment / idle too high

    Evening all. jistvjadctjr engine running and noticed that when I set the control to neutral the idle hangs ar 1500rpm sometimes 1200 rpm and if I push the cables towards the carb the idle drops to where it stalls, so I adjusted the stop screw with the spring on the carb clockwise but that just...
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    3.0LX starter motor install issues - bolts

    Hi all went to install a new starter today only to find the bolts that came from the original motor were too long leaving the starter somewhat loose. have I missed something here like a spacer ? this is the one I got from cross referencing the OEM part number...
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    Starting and High current draw issue Merc 3.0LX

    Hi All, I wonder if you can help me with this. We have a new to us boat and we have had it starting and running nicely and know compression is good and there are no major mechanical issues. Its been stood for a few months since last starting it and we came to start it today with little...
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    14x19 stainless 3 blade vs 14.5x19 aluminium

    Hi all, I have been offered a stainless 14 x 19 stainless prop for very good money to run on a bayliner Capri 1850 fitted with a 3.0LX motor. the original prop is 14.5 x 19 and I’d like to ask what the effect of the 14 would be ? is it suitable ? What would the trade off be ? use of boat is...
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    Trim Pump Bracket Replacement - old mounting holes

    Pulled the rusty rotten bracket, the old mounting holes are shot and no way to get the old headless bolts out. i plan to drill new holes and used stainless self tapping screws that are heavy duty - any issue with that method ? thanks
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