HI,
I don`t have that particular problem.I`m only asking this because someone else`s outboard was acting up and he claimed this was the problem so I figured I`d look for exhaust port in the manual but couldn`t find anything on it.However I do have problems to resolve with my outboard.
My 1997 oil injected 40 hp 4cyl Mariner is hard to start and stalls when I try to accellerate after putting it in gear.It does pick up a bit when I choke the carbs.I`ve just installed a new stater du to an electrical problem that ocured mid summer past.I was thinking gas problem but a friend wantsto check the tyming.Do you have any suggestions?
The 4cyl are not known to carbon up the exhaust system, unlike some of its 3cyl cousins. I doubt thats your issue.
Don't mess with the timing until you cover the basics (compression, spark, fuel/air). Not a bad idea to double check timing, but your symptoms don't suggest thats the issue.
Sounds like fuel problem to me.Have you taken a look at your fuel filter,also take a look at your fuel line and the primer ball.Over time ,they will break down and clog or restrict fuel at the point where it enters the motor,sometimes before reaching the fuel filter
Only outboard I've ever seen with clogged exhaust ports was a 1939 Johnson 9.8hp, and that had been running a steady diet of straight 30-wt. mixed at about 12:1 ratio. VERY unlikely on a modern outboard with oil injection...
- Scott
