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    Mercuiser 4.3EFI Wont start - how to troubleshoot the fuel system

    I have a 2001 4.3EFI (serial OMO98359) which won't start. The battery is fully charged, there is plenty of fresh fuel in the tank, spark from the spark leads but no sign of fuel at the injectors at the throttle body. I can hear the fuel pump when the ignition is switched on as normal, the...
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    Alpha 1 Gen II Trims Up but not Down

    Hi all. Looking for some suggestions for troubleshooting my Alpha 1 Gen II on a 4.3EFI (2001). The outdrive trims up ok (although I think it is slower than it used to be), but won't trim down unless I stand on the leg with the trim down button pressed. The trim pump is running fine, the...
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    Which power steering hose???

    Following on from my thread about how to remove the old high-pressure power steering hose, my next question is which part number do I need to replace it? The engine is a 2001 4.3EFI serial OMO98359 and I have found two different part numbers that look like the replacement hose: 32 806222 16...
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    Replacing power steering hose on Mercruiser 4.3

    The high pressure power steering hose has failed at the steering rack end, so I need to replace it. I have unbolted the connection from the rack, but am having trouble at the pump end, as it is pretty inaccessible. Two questions: 1) Anyone know what size spanner I need to put on it? It will...
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    Trim/tilt fluid gone awol

    I noticed the other day that the trim/tilt fluid level was right down (its hard to tell, but it looked like the reservoir was in fact empty) and the engine trim/tilt is no longer working. The pump runs when I press the button, but no movement on the leg (the leg is in the fully down position...
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    Mercruiser 4.3 Manifolds & Risers - how to check them?

    My 2002 boat has a Mercruiser 4.3 EFI motor with the Alpha Gen 2 outdrive. The engine has around 300 hours use on it, all of which has been in saltwater and normally flushed with fresh water after use. Now I know that the exhausts have a finite lifespan on them and failure can be catastrophic...
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    Seized Mercury 5HP Outboard

    I?ve aquired a 2001 Mercury 5HP outboard, which looks in pretty good condition, but is seized (or at least the start pull cord won?t pull out). The motor has been in storage for at least a year, but was supposed to be working fine went it last ran. I?m thinking of first of all examing the pull...
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    4.3EFI stalls in neutral when hot

    I?m having a problem with my 2001 Mercruiser 4.3EFI. The engine starts and runs fine when on the flush muffs and runs perfectly when out on the water. The only problem is, when I?m out on the water and stop and put the boat into neutral the engine sometimes stalls. The alarm sounds as it cuts...
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    Removing & replacing drive oil screws

    I?ve read the manual on how to change the drive oil on my Alpha 1 Gen 2 outdrive, but was wondering what the best way is to remove and replace the oil drain and vent screws. In particular how you torque the screws back up to the correct setting when you replace them. I?m guessing that just...
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    How long does it take to change a shift cable?

    Just got the bill from the workshop for changing the shift-cable on my 2001 Alpha 1 Gen 2 drive and they have charged me for 5 hours labor? Sounds like a lot to me, given what I have read on here, or does that sound reasonable? Thanks for any comments.
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    Gear lube leak?

    I've just had the shift cable replaced on my 2001 Alpha 1 Gen 2 sterndrive (got the work done professionally) as it was jammed. I took the boat out for about 1 hour after the work was done to test it. Everything works fine, except when I went down to the boat today there was a small pool of...
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    4.3EFI Changing the distributor cap and rotor arm

    I?ve just serviced the engine (2001 Mercruiser 4.3EFI) on my boat and had a look at the rotor arm/distributor cap, which is looking a little worn on the contacts. As a precaution I think I will replace both - do I need to check the ignition timing after I have replaced them? Also how long do...
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    Setting the ignition timing on a Mercruiser 4.3 EFI

    I am just about to service the engine on my Mercruiser 4.3EFI (2001) and have a question on how to set the ignition timing. The manual says you need a Scan Tool or a Timing Tool, which I don't have. Do you need these tools to do the job or is there a workaround? I've had a look through this...
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