Waterfowlnut
Cadet
- Joined
- May 24, 2015
- Messages
- 10
Hello all, new member to site, but I often come here for reference. Seems like a great group of guys here, I've been tinkering with older outboards for a little while but I'm still a newbie.
OK, so a little background about my engine.. I got this engine with a project boat I bought a few years back. The seller said he had it in his barn for about 15 years and was never able to get it running. When I received it, it pulled over fine, had good spark but was just rough cosmetically. I pulled the carb off, cleaned it, put it back together, primed tank, and with gas leaking out of the carburetor it fired up on the third pull. So...
I rebuilt the carb, replaced all the seals in the lower unit, (the gears were all shiny and looked good) and replaced the impeller with a new wear plate. Check of the cylinders said 84 and 85 psi, good blue spark on both, replaced the plugs and made sure they were gapped to 30. Runs like a champ in a barrel, starts by the third pull. Except... On the port side of the engine on the exhaust leg, there's that small "weep" hole about midway up, while running there's frothy, foamy gas/water mixture coming out, on the back of my boat (14' 1957 crestliner commodore) it'll troll just fine, up to about 1/4 throttle it's good, but at WOT it won't come up on plane, makes a decent wake, but won't move faster than about 5 mph. That's with my 120 lb wife in the bow, I had it out once by myself, and with a half a cooler full of water in the bow it did plane out sorta and cruised along at about 10-15 mph-ish. Something's definitely not right it should have a whole lot more power than that. Any ideas? My 1963 18 hp Johnson shoves this boat like a bat outa h*#$, and there nothing coming from the that small hole in the exhaust leg. I'd really like to get this motor running right, any ideas suggestions are greatly appreciated. Maybe a back head gasket between cylinders? The coils looked good through the viewing hole under the flywheel but I don't have a flywheel puller. Could the electrical be the problem?
OK, so a little background about my engine.. I got this engine with a project boat I bought a few years back. The seller said he had it in his barn for about 15 years and was never able to get it running. When I received it, it pulled over fine, had good spark but was just rough cosmetically. I pulled the carb off, cleaned it, put it back together, primed tank, and with gas leaking out of the carburetor it fired up on the third pull. So...
I rebuilt the carb, replaced all the seals in the lower unit, (the gears were all shiny and looked good) and replaced the impeller with a new wear plate. Check of the cylinders said 84 and 85 psi, good blue spark on both, replaced the plugs and made sure they were gapped to 30. Runs like a champ in a barrel, starts by the third pull. Except... On the port side of the engine on the exhaust leg, there's that small "weep" hole about midway up, while running there's frothy, foamy gas/water mixture coming out, on the back of my boat (14' 1957 crestliner commodore) it'll troll just fine, up to about 1/4 throttle it's good, but at WOT it won't come up on plane, makes a decent wake, but won't move faster than about 5 mph. That's with my 120 lb wife in the bow, I had it out once by myself, and with a half a cooler full of water in the bow it did plane out sorta and cruised along at about 10-15 mph-ish. Something's definitely not right it should have a whole lot more power than that. Any ideas? My 1963 18 hp Johnson shoves this boat like a bat outa h*#$, and there nothing coming from the that small hole in the exhaust leg. I'd really like to get this motor running right, any ideas suggestions are greatly appreciated. Maybe a back head gasket between cylinders? The coils looked good through the viewing hole under the flywheel but I don't have a flywheel puller. Could the electrical be the problem?