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    What cooliing fluid in reman 5.0?

    Have a new block 5,0 gm vortec with new Monitor cooling system. What kind of cooling fluid should I use? One manual says dexcool, the other says LongLife.... Whats your suggestion??
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    Start 1999 5.0Gi stand alone: wiring in engine main connector?

    I have the engine in my garange ie. disconnected from the boat so I don't have the boat part of the harness. How do I connect directlyt to the main connector to emulate the iginition switch? I am looking to turn on the ignition and also run the starter to test the engine on land. Anyone tried...
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    New block for 5.0Gi 1999; how to mount and set ignition?

    Hi pros, I am replacing the block of my 5.0gi since it is rusted and actually has a small crack.. It was running great when it happened. I am getting a longblock with heads. Then, moving all the parts from the current block should be a simple job. I have one uncertainty and that is the...
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    5.0Gi: Replacing flywheel ring gear, would you remove bell housing in boat?

    somehow both a cog in the starter planetary wheels and a couple of cogs on the flywheel ring is ripped off, so I have to replace the starter AND the flywheel ring gear. Should I try and leave the bellhousing in the boat when lifting the engine out or just remove that too? Still can't understand...
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    5.0GI PWTR 1999 PS/power steering fluid leak. Where??

    Noticed a slight whining and slammer when boating the other day, found it got slightly worse when turning. So the fluid level was way below the stick in the PS pump, had to refill with some atf from the trim unit. It stopped making noise but what a pain. Anyways, it was ok level at 25 hrs ago...
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    Leaking sea water pump on 1999 5.0Gi

    Just found an almost new v belt worn completely down in 3 hrs operation, also saw blackish water spray residue in engine compartment and some dripping. Replaced o-ring in impeller housing but no difference, water dripping and spraying from the v belt. My take is that the water pump is leaking...
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    Mariner 30M (Yamaha?) info wanted!

    Have a Mariner 30M, serial 689 322974. It has the same prop as yamaha engines and also yamaha markings on some metal parts like the block etc. How old is this engine? It is running fine and is simple to maintain but a bit heavy to pull start so I am thinking of adding electric start to it...
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    1999 5.0Gi: Switch button at the shift mechanism??

    Re: 1999 5.0Gi: Switch button at the shift mechanism?? No, the engine won't start in gear now so thats not it. I found a picture to illustrate which switch I mean: What does this switch do? is it supposed to be in that hole?
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    1999 5.0Gi: Switch button at the shift mechanism??

    have the concealed single handle shift control on my boat and I recently removed the panel and found some unknown wiring behind it... One broken switch button ( I think) of some sorts, two wires going in to it. Seems like it could have been mounted in a hole in the shift assy fascia, just in...
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    Spark plug wires on 5.0gi 1999?

    What's the life span for spark plug wires? Now, the engine runs, but are the wires life long service or?
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    problem w. 5.0Gi 1999: Not starting, no fuel from injectors

    Hi, have starting problems with the 5.0gi. We winterized the boat last fall and everything was good. Last week I was going to start it on land after changing plugs to new NGKs, distributor and cap, impeller, fuel filter and drive belts. So: - Turned the key, the starter was cranking but engine...
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