05-04-2010, 08:48 PM
Well as some of you know I bought a 1979 Chrysler tri-hull the other day.
It has a 1978/79 mercury 90hp motor on it.
It was running fine the first 3 or 4 times I have had it out then all of a sudden it now decides to start stalling. It will idle just fine and will allow me to throttle it up for a little bit then dies.
I know I have good compression as the boat wouldn't start and idle good without it. I also know it has a good spark as it is starting as well and idles
I have my concerns with vapor lock because of the damn ethonal in gas these days..... I am currently using 89 octane the same as when I had it out the 3 or 4 past times wihtout any issues.
Could it be
1. Vapor lock
2. Need to clean carb
3. To rich of a mixture
4. Some problem I am not aware of
I am probably going to run an octane booster to see if it will fix the problem that and change the plugs but if any one else has any other ideas I would be highly grateful
It has a 1978/79 mercury 90hp motor on it.
It was running fine the first 3 or 4 times I have had it out then all of a sudden it now decides to start stalling. It will idle just fine and will allow me to throttle it up for a little bit then dies.
I know I have good compression as the boat wouldn't start and idle good without it. I also know it has a good spark as it is starting as well and idles
I have my concerns with vapor lock because of the damn ethonal in gas these days..... I am currently using 89 octane the same as when I had it out the 3 or 4 past times wihtout any issues.
Could it be
1. Vapor lock
2. Need to clean carb
3. To rich of a mixture
4. Some problem I am not aware of
I am probably going to run an octane booster to see if it will fix the problem that and change the plugs but if any one else has any other ideas I would be highly grateful