rreichstadter
Cadet
- Joined
- Mar 30, 2017
- Messages
- 14
I recently purchased a 1999 Force 90HP outboard. Motor has great compression, 155 on all 3 give or take a psi. Installed the motor on my 16ft Boston Whaler and ran great the first couple of times no issues. My buddy took it out the other day with his family and it started right up and he got to the resume safe speed zone and tried to open it up and it died then no start. He got towed back and when I popped the cowling immediately noticed the top spark wire plug had come completely off of the spark plug. Problem solved.
Popped it back on and it started right up. Next time I took the boat out, started fine and ran great until about 3/4 throttle, it starts to drag a little bit. When it is WOT it runs ok but surges forward then back down again. It continues to do this at WOT, surges to normal WOT speed, then back down to what would normally be about 3/4 throttle. If I have it at 3/4 throttle it runs normally.
Seems like a fuel issue, I have cleaned the carbs, replaced all the gaskets and fuel lines and same problem. I have not messed with the fuel pump yet. The top spark plug wire that had come off when my buddy took it out jiggles a little more than the others, could it be losing connection intermittently at high speeds or do I need to dig deeper into the fuel issue? there are a couple of smaller fuel? lines that seem to be going into the power head itself? Gonna change these too as they seem a bit flimsy. Not entirely sure what those are for...Thanks in advance. Happy to post pics or videos if that helps.
Popped it back on and it started right up. Next time I took the boat out, started fine and ran great until about 3/4 throttle, it starts to drag a little bit. When it is WOT it runs ok but surges forward then back down again. It continues to do this at WOT, surges to normal WOT speed, then back down to what would normally be about 3/4 throttle. If I have it at 3/4 throttle it runs normally.
Seems like a fuel issue, I have cleaned the carbs, replaced all the gaskets and fuel lines and same problem. I have not messed with the fuel pump yet. The top spark plug wire that had come off when my buddy took it out jiggles a little more than the others, could it be losing connection intermittently at high speeds or do I need to dig deeper into the fuel issue? there are a couple of smaller fuel? lines that seem to be going into the power head itself? Gonna change these too as they seem a bit flimsy. Not entirely sure what those are for...Thanks in advance. Happy to post pics or videos if that helps.