sludgeguy68
Petty Officer 2nd Class
- Joined
- Jul 16, 2010
- Messages
- 111
1973 Evinrude, 25hp
History: Put in new plugs and cleaned carbs 2x with new carb kit. Was running OK except at lowest idle, took it on the water anyway. Started right up and ran fine a bunch of times after fishing, then at WOT on the way back home, it bogged down and died, wouldn't re-start.
Checked plugs and found stripped thread on lower cylinder, the plug pretty much popped out. Helicoiled plug thread and another stripped cylinder head thread. Resurfaced head, new gasket, torqued to spec. Also put in a new t-stat as there wasn't one in there upon opening, and I also replaced pull cord and starter spring after they broke.
Now: I can't get engine running for more than a two seconds - every so often while pulling cord, the exhaust pops with a bit of a splash. When it pops, the cord gets taught, and it's harder to get it going after that happens.
There seems to be a milky white substance in the river floating out (oil?), and some bubbles of gasoline surfacing, especially after the "pop."
Also noticed some water in the bottom of motor pan, not sure if it's from the splashback from popping, or something worse...
Played with low speed needle, choke, and calibrated throttle arm. Primer bulb stays firm. Out of money and ideas.
History: Put in new plugs and cleaned carbs 2x with new carb kit. Was running OK except at lowest idle, took it on the water anyway. Started right up and ran fine a bunch of times after fishing, then at WOT on the way back home, it bogged down and died, wouldn't re-start.
Checked plugs and found stripped thread on lower cylinder, the plug pretty much popped out. Helicoiled plug thread and another stripped cylinder head thread. Resurfaced head, new gasket, torqued to spec. Also put in a new t-stat as there wasn't one in there upon opening, and I also replaced pull cord and starter spring after they broke.
Now: I can't get engine running for more than a two seconds - every so often while pulling cord, the exhaust pops with a bit of a splash. When it pops, the cord gets taught, and it's harder to get it going after that happens.
There seems to be a milky white substance in the river floating out (oil?), and some bubbles of gasoline surfacing, especially after the "pop."
Also noticed some water in the bottom of motor pan, not sure if it's from the splashback from popping, or something worse...
Played with low speed needle, choke, and calibrated throttle arm. Primer bulb stays firm. Out of money and ideas.
