G'day fellow boaters,
I've recently purchased a 120 Looper and replaced the throttle/shift controls too.
The first run with the new engine was with the old cables and I got her up to 5800 rpm no worries. I've then replaced the cables and now can't get it on the plane and won't go over 3000rmp... just bogs down. The silencer cover was off so I could see the main jets spraying plenty of fuel into the carbys at WOT (the carbys WERE flooding on the previous time out... have fixed that) .
Then as I was making my way into the ramp she died on me... just gave an occasional sputter. Glad I took a paddle and there was no wind!
Anyhow, I've check for spark (OK), compression (140 psi all 4 cylinders), used a spare fuel tank with fresh fuel. Even tried squirting fuel down it's carbys... all with no luck.
All 4 plugs were wet with fuel after cranking for a while.
Any ideas? Maybe the timing/throttle advance is right out from when I replaced the throttle cable?? Any trick to replacing the cable? When I try to start it I get an occasional quick combustion. Sticky timing plate??
Just letting you know the VRO has been removed... premixed now with standard diaphram fuel pump. I've pulled all 4 carbys apart, cleaned and checked them too.
I have a timing light and will make a 7/16 air spark tester and try them on the weekend.
Cheers.
I've recently purchased a 120 Looper and replaced the throttle/shift controls too.
The first run with the new engine was with the old cables and I got her up to 5800 rpm no worries. I've then replaced the cables and now can't get it on the plane and won't go over 3000rmp... just bogs down. The silencer cover was off so I could see the main jets spraying plenty of fuel into the carbys at WOT (the carbys WERE flooding on the previous time out... have fixed that) .
Then as I was making my way into the ramp she died on me... just gave an occasional sputter. Glad I took a paddle and there was no wind!
Anyhow, I've check for spark (OK), compression (140 psi all 4 cylinders), used a spare fuel tank with fresh fuel. Even tried squirting fuel down it's carbys... all with no luck.
All 4 plugs were wet with fuel after cranking for a while.
Any ideas? Maybe the timing/throttle advance is right out from when I replaced the throttle cable?? Any trick to replacing the cable? When I try to start it I get an occasional quick combustion. Sticky timing plate??
Just letting you know the VRO has been removed... premixed now with standard diaphram fuel pump. I've pulled all 4 carbys apart, cleaned and checked them too.
I have a timing light and will make a 7/16 air spark tester and try them on the weekend.
Cheers.
