BigNiner19
Petty Officer 1st Class
- Joined
- Jul 1, 2006
- Messages
- 234
Fouled a plug last week after the motor had been running great for quite a while, so I tossed some new plugs in and also decided to rebuild my top carb because I noticed it was spitting fuel when I took the carb cover off recently.
Rebuilt the top carb, put everything back together...fired up the motor on the hose and it fired up but was idling really quick. So I just barely backed down the spark lever ever so slightly and boom it was perfect. Idling nice and smooth and strong without any popping. Checked each idle/mixture screw on the carbs and they right, gave the motor a couple short quick low RPM revs and it was strong and smooth.
Brought the boat to the ramp, launched and fired it right up and idled away nicely (might need to step up the idle a touch but not much) and then got into a go fast zone and hit the throttle and it ran great for about 15 seconds and then something happened/cut out and suddenly it felt like I was running on just two cylinders. Limped it back to the dock, messed with it for a minute, but everything seemed right so I tossed it back on the trailor.
I checked the brand new plugs and they look just fine, fuel connections are right and tight, linkage is working as it should, I dont know what could have happened. Any suggestions? This is a Johnson 60 year 1991 3 cylinder
Cory
Rebuilt the top carb, put everything back together...fired up the motor on the hose and it fired up but was idling really quick. So I just barely backed down the spark lever ever so slightly and boom it was perfect. Idling nice and smooth and strong without any popping. Checked each idle/mixture screw on the carbs and they right, gave the motor a couple short quick low RPM revs and it was strong and smooth.
Brought the boat to the ramp, launched and fired it right up and idled away nicely (might need to step up the idle a touch but not much) and then got into a go fast zone and hit the throttle and it ran great for about 15 seconds and then something happened/cut out and suddenly it felt like I was running on just two cylinders. Limped it back to the dock, messed with it for a minute, but everything seemed right so I tossed it back on the trailor.
I checked the brand new plugs and they look just fine, fuel connections are right and tight, linkage is working as it should, I dont know what could have happened. Any suggestions? This is a Johnson 60 year 1991 3 cylinder
Cory
