fisherman81654
Petty Officer 2nd Class
- Joined
- Sep 5, 2011
- Messages
- 135
About two years ago,I was on the lake going about fifty five and suddenly ,bammmm ,sounded like a bang and chatter,I stoped.Steam was comming from my engine as the water rushed to the back of the boat.
I figured I blew a cylinder.After a little wait I started the boat, drove it home. I think that is when I lost some power not really sure.
Tore it down that weekend and found nothing wrong.No I didnt do a compression check before I took it down. Dumb huh! It now has 120psi on all six cylinders My boat is a 1985 v6 mariner serial # A137316
My problem is I have lost 1000 rpms.The boat used to run 5500 to 6000rms.Now I'm stuck at 5200 rpms at full slugish full throtle. I have been trouble shooting this and found that on muffs I have good spark on all six cylinders .When i run it on the lake at full throtle and then take the plugs out,five are a little wet and one,
the top on on starboard side is dry.
I had a tech tell me today to take the plug wire off that cylinder while the boat was running on muffs and listen for a miss,there was no miss and there is fire on that plug,so that tells me that that cylinder is not getting fuel,correct? I had also installed a fuel pump kit today.
I took off the top carb today and dissambled and examed.All passages were clear and cean including the jets.
Tomorrow I am going to reassemble and run it on muffs and spray some fuel on that carb port of that cylinder and see if it changes the sound of the engine.
My question is ,could that sound that I heard have been a reed? if so could that reed be blocking the exhaust?
Could that be why I have no fuel on the top clinder and loss of 1000 rpms on top end?:facepalm:
I figured I blew a cylinder.After a little wait I started the boat, drove it home. I think that is when I lost some power not really sure.
Tore it down that weekend and found nothing wrong.No I didnt do a compression check before I took it down. Dumb huh! It now has 120psi on all six cylinders My boat is a 1985 v6 mariner serial # A137316
My problem is I have lost 1000 rpms.The boat used to run 5500 to 6000rms.Now I'm stuck at 5200 rpms at full slugish full throtle. I have been trouble shooting this and found that on muffs I have good spark on all six cylinders .When i run it on the lake at full throtle and then take the plugs out,five are a little wet and one,
the top on on starboard side is dry.
I had a tech tell me today to take the plug wire off that cylinder while the boat was running on muffs and listen for a miss,there was no miss and there is fire on that plug,so that tells me that that cylinder is not getting fuel,correct? I had also installed a fuel pump kit today.
I took off the top carb today and dissambled and examed.All passages were clear and cean including the jets.
Tomorrow I am going to reassemble and run it on muffs and spray some fuel on that carb port of that cylinder and see if it changes the sound of the engine.
My question is ,could that sound that I heard have been a reed? if so could that reed be blocking the exhaust?
Could that be why I have no fuel on the top clinder and loss of 1000 rpms on top end?:facepalm: