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    9.9 or 15 HP carburator

    Does anyone know how to tell a 9.9 carb from a 15 HP? I have a 1980 Evinrude and the carburator on it has the numbers 390 049 on the top of it. Is this enough to tell which carb it has? Thanks a bunch! -BB-
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    1972 Evinrude 125 HP trouble under flywheel

    Hello. I have a 1972 Evinrude 125 HP model 125283R. It has the style of igintion system that just uses one coil... and it feeds to a stator looking thing under the flywheel with four wires coming out of it.<br />I'm having trouble with spark. It will through out a good hot 1/2" gapped spark out...
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    Low compression head gaskets

    What kind of compression increaseas can one expect by installing a low compression head gasket? How bout if we shave .030 off the head to go with it?<br />Johnson v-4 with 85 pounds on all four.<br /> -BB-
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    clinton J-9 cooling system and RPMS

    Hello to all.<br />I recently acquired an old,neglected Clinton J-9. After a short carb cleaning I had the pleasure of hearing this motor run. It sounds absoulelty BEAUTIFUL. I've owned around 4-5 of the J-9's and this one is MUCH quieter than all of the others.<br />My question is in regards to...
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    No spark on one popper

    Hello. I've got a stumper. It's a 1971 4 HP mercury with the thunderbolt igintion system with points.<br /> I replaced on the corred wiring with new and filed the points and the engine had good hot spark. I then went on to degrease and wash the engine, clean the carb, and replaced the...
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    1975 Mercury 65 HP three cyl interchange

    Anyone know if a lower from a 1975 Merc 65 HP 3 cyl and a 1966 50 HP Mercury will interchange?<br /> They look pretty much the same.... but the driveshaft on the 66' doesn't have a preload pin.
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    OMC vs MERCURY MERC MORE RELIABLE?

    Ok, Here's my delima. I see that the Johnson/Evinrude repair forum has 30,000+ topics posted and the Mercs only have 16,000+. Are the Merc more reliable than the Johnnyrudes?<br /> Maybe there are just ALOT more Johnnyrudes produced than the mercs.... anyone have any numbers on production...
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    brainpicker for the day, 1977 55 HP Evinrude cooling puzzle

    1977 Evinrude 55EL77D.<br />Motor seems to "quit pumping" water at high speeds. This engine does not have a "tell-tale". It just shoots water out the back of the exhaust housing.<br /><br />Fact 1: The motor pumps GREAT water in a test tank and at low speeds.<br />Fact 2:The motor is mounted on...
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    1986 28 HP Evinrude throttle linkage

    Anyone know the CORRECT way to adjust the throttle linkage on a 1986 28 HP Evinrude? I know to set the cam follower between the two marks just as it starts to move,,,but this engine also has ANOTHER adjustment. It looks like the "fuel saver" linkage on the OLD ones. It allows the carb to open up...
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    resurfacing a head, maxium compression

    I'm attempting a rebuild on an early 80's(i think it's 84, would have to double check) 60 HP Evinrude 2 cyl outboard. <br /> The head has pitting/damage on one of the surface's. My machine shop says they can resurface it and get the bad out but we are unsure on a minium head thickness. My Clymer...
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    thick skulled monkey

    I'm a thick skulled monkey who can't help but tear into every outboard I run across. Is there any cure?<br /><br />p.s.<br />I would greatly appreciate help on my post below!!!
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    thick skulled monkey

    I'm a thick skulled monkey who can't help but tear into every outboard I run across. Is there any cure?<br /><br />p.s.<br />I would greatly appreciate help on my post below!!!
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    timing "vs" bad bearings

    Hello everyone. I first want to thank all of the KNOLEGEABLE people who take the time to read through these threads. I truely enjoy working on outboards and iboats forums.<br /> Here's the pickle!:<br />I recently acquired a BEAUTIFUL 1973 9.8HP Mercury outboard. It has 120#'s of compression on...
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    anyone know how to test an old square type switchbox?

    I'm working on an old Mercury inline 6 with a distributor type ingntion. It did not run when I purchased it so I cannot rule out incorrectly routed wires. It does not have any fire. It has the old square type switchbox with four color coded terminals on one side and three on the other. I know...
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    stabil and premix

    Ok, I'm not real educated on this so please bear with me.<br /> I know everyone recommends Sta-bil for fuel stablizer in two and four cycle engines. I'm still a little "iffy" about putting the stuff in two cyle pre mix (25-1 or 50-1). The thing that bothers me is that pre mix fuel is supposed...
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    the hardest wiring question ever

    The motor is a 1987 Johnson VRO model J40ELCUD that has no spark. <br /> I've got three knife switches disonnected by the solenoid. One of them goes to the temp sensor(tan?) <br /> The other two are also a "tan" color but look like the same shade, so I assume that they go together.<br /> The...
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    Disconnecting VRO

    I just finished putting together a 87 40 HP two cylinder Johnson with a VRO. It's my first complete rebuild and I'm very anxious to start it up. I have two holes bored .20 over, two piston kits, all new bearings, water pump impeller, and a powerhead gasket set invested. I'm stuck on the VRO...
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    first rebuild... lost on rods and VRO

    I'm doing my first complete rebuild on a 1987 Johnson VRO 40 HP outboard. :) I already have the block work done(bored .020 over) and have all the parts for assembly. I had to remove the rods from the crankshaft to remove the crankshaft assembly from the powerhead. When I did, I didn't take...
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    water seeping out of spark plug whole

    I'm working on a 1979 75 HP Johsnon 3 cyl stinger(stinker). It has 150/135/150 #'s of compression on the cyl. I noticed the #2 spark plug showed evidence of moisture and the threads were 90% gone so I pulled the head, tapped hole and put in insert, and replaced the head with a new gasket. My...
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    How do I get certified?

    I've been buying,repairing and selling outboard engines for about two years. Looking for some type of OMC/Mercury certificate to help draw outside business in. Anyone know of anything?
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