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    Converting 2.4 Merc EFI to 200 carbs

    changing a 200 efi to carbs, which air vent jet should I use, two are listed .084 or .096? it will be used in Minnesota.
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    Cold compression test question

    will a compression test on a cold outboard be as accurate as one done on a motor thats been warmed up?
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    Does compression determine horsepower???

    I purchased a 1994 Yamaha 130 for my bass boat. It runs great. I got a Yamaha service manual for it and the specs show that a 130 should have between 134psi and 164psi. I had a compression test done on it before I bought it and it was 125, 129, 130,134. Will this motor be able to produce 130...
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    Merc 150 efi rev limiter

    Anyone know what the rev limiter is set at on the ecu from an early 1990's 150hp? part no. 824003 A10. thanks, Don
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    Prop for old Merc

    Does anyone know if anyone still sells props for old Mercs? I need one for a 1972 merc 50hp. 11 splines, an 11" or 12" pitch will work. The part number on the old prop is 48-32186A1-12.
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    1983 235hp Evinrude repower pros and cons...

    Looking to repower my 18' V-King, found a 1983 235hp Evinrude that has a rebuilt powerhead. What are the pros and cons someone can expect from this model? Did it really produce two hundred and thirty-five horse power?
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    1985 Mercury 90hp in-line six compression

    A friend got a 1985 Mercury in-line 6. I tested the compression for him and was surprised that all six cylinders were over 150lbs. Is this normal for these old tower of powers? It doesn't look like its been cracked open and rebuilt.
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    1988 Merc 220 xri...maybe a dumb fuel injector question?

    Got a 1988 Merc 220 xri thats running like its a 5 cylinder instead of a six. Spark is good but I think the #6 cylinder isn't getting fuel? Is this possible on a efi? Does each injector feed each cylinder? This will be my first time working on an efi so I'm alittle green...
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    Yamaha 140?

    Anyone know why the Yamaha 140 V4 2-stroke was not sold or marketed in North America?
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    Yamaha cam roller part number?

    Anybody know the part number for a cam roller for a 1994 Yamaha 130hp 2-stroke?
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    1994 Yamaha 130hp push to choke ignition won't work...

    Got a 1994 130hp Yamaha 2-stroke, model 130TLRS, that I rigging in a bass boat. I prefer the "push to choke" style key switch. So I got one, 703-82510-43-00, connected each wire to the matching color wire but no luck. The motor will turn over but thinks the kill switch lanyard is off. No spark...
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    1997 35hp Johnson loses spark???

    1997 35hp Johnson model J35QLEUR seems to be losing spark somehow. After its been sitting awhile, maybe after disconnecting and reconnecting the battery, it will start. Sometimes run for a minute, sometimes just a few seconds...then stop like it was turned off. When I try starting it again...
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    1997 35HP Johnson won't idle...needs rich/lean screw adjustment.

    1997 Johnson 35hp model J35QLEUR, 3 cyclinder, 3 carb, 2-stroke. won't idle. many hands have worked on this motor before so i want a good starting point. How many turns out from lightly seated should the rich/lean screws be set at? thanks, Don
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    Need help fooling the warning alarm...

    Got a 1994 Yamaha 130hp 2-stoke, model 130TLRS, that runs great but the oil pump keeps over filling the oil tank under the hood. Instead of paying hundreds of dollars replacing parts I decided to disconnect the oil line from the tank in the boat and just refill the tank under the hood myself...
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    1984 8hp Mariner gets wet in bottom hole

    Just got a 1984 8hp Mariner(8VL 6G1-L-308585), made by Yamaha, she starts right up and idles good for a couple of minutes, starts to run rough and will die. Checking the spark plugs, the bottom one gets water on it. I replaced the inner exhaust plate gaskets and the head plate gasket. Still gets...
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    Yamaha gearcase swap 90 &115

    Will the gearcase from a1989 Yamaha 90hp fit on a 1993 Yamaha 115hp? Both are long shafts and 2-strokes. Are the gear ratio the same?
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    Which is the right spark plug?

    picked up a 1977 Johnson 6hp 6R77M. I believe this was the first year with CDI. I know OMC used Champion plugs so I went to their on-line catalog and looked up the plug. It recommended QL88C. I have an old Champion catalog from 2003, it shows L86C. I then went to Crowley Marine, they list...
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    Water pressure psi?

    What is the minimum and maximum psi an outboard should operate at? At idle my gauge shows 2. Cruising around 10. Wide open no higher than 15.
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    1989 40hp Evinrude lift assist ceased.

    A buddy inherited a boat with a 1989 40hp Evinrude E40TELCEC with lift assist. The lift is ceased with the motor partway up. Is there a release to drop it or can it be removed and used without one?
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    Yamaha choke plate question...

    I have a 1993 Yamaha 130hp 130TLRR 2-stroke. one choke plate has small holes the other has large. which plate goes on top and which one goes on the bottom? or does it matter?
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