aalbert
12-01-2002, 03:15 PM
Was out yesterday, and after about 3 miles of idle speed, and 9 miles of 4400-4800 cruising, my motor started to stumble/bog.
Brought it off plane, and did a cursory visual for anything out of the ordinary, and didn't find anything. Tried to go back on plane, and at 3300-4000rpm, the engine stumbled again. Repeated several times, same story. Tried to maintain just 3000rpm - same story.
Finally limped the 12miles back home at 1100-1200rpm. Replaced the engine mounted fuel filter (didn't note any obstruction in the old one) as well as the fuel/water seperator. Tested the boat with no load, and could free rev to any desired RPM.
I took the boat out again today, and was able to maintain 3400rpm, but a little bit but the motor wasn't happy (boat wasn't on plane yet, so it was having to struggle - only kept it at 3400 for 10 secs or so) and I didn't want to hurt anything more than might have already been done.
Brought it back to idle, killed the motor for half an hour - took a swim to relax, and brought her back in at 1200 rpm or so.
Only other factor that I can think of as of late, is that I gassed up with 30 gallons of fuel yesterday, and I am wondering if it was full of crud....
What are the general thoughts on this? Rebuild carb, start looking for damage to motor with a compression check, or ???
Brought it off plane, and did a cursory visual for anything out of the ordinary, and didn't find anything. Tried to go back on plane, and at 3300-4000rpm, the engine stumbled again. Repeated several times, same story. Tried to maintain just 3000rpm - same story.
Finally limped the 12miles back home at 1100-1200rpm. Replaced the engine mounted fuel filter (didn't note any obstruction in the old one) as well as the fuel/water seperator. Tested the boat with no load, and could free rev to any desired RPM.
I took the boat out again today, and was able to maintain 3400rpm, but a little bit but the motor wasn't happy (boat wasn't on plane yet, so it was having to struggle - only kept it at 3400 for 10 secs or so) and I didn't want to hurt anything more than might have already been done.
Brought it back to idle, killed the motor for half an hour - took a swim to relax, and brought her back in at 1200 rpm or so.
Only other factor that I can think of as of late, is that I gassed up with 30 gallons of fuel yesterday, and I am wondering if it was full of crud....
What are the general thoughts on this? Rebuild carb, start looking for damage to motor with a compression check, or ???