johnzonh
Petty Officer 2nd Class
- Joined
- Jun 11, 2008
- Messages
- 137
i have put up several posts about my non-start issues with this and figured I would update again. I need help figuring out this one.
I was trying to diagnose a non start situation over the last two months after a new head gasket...new starter...carb rebuild...(Mercarb 2bbl) new coil , points, cap, condenser, plug wires. Got the engine to fire but it only lasted a few seconds... (added no gas) and then it would not start again.
I am frustrated to no end..but these are the facts...
The engine started two months ago with the existing mechanical fuel pump...no flooding...no issues ..other than water in the oil from a leaking riser gasket..so to rule out any other leaks..replaced all the gaskets. Now..no leaks... engine didn't hydro lock...mechanically sound.
-each time I have attempted to restart this motor..without adding throttle...the intake floods. I have replaced the needle and seat with the originals, have also gone to the spring loaded needle and seat. Mixed and matched needles and seats. Still...floods the intake. Each time I have pulled the carb apart..the float bowl is about HALF full. Each time I have inspected the carb...the sight tube is CLEAN..no fuel..nor does is smell like fuel. the fuel pump...works, and it seems like the carb is doing its job of halting fuel flow at the top end of the float travel.
-the needle and seats all have not stuck..and seem to close correctly.
-good compression test...
-coil voltage in "ON" is right at 5 volts
-coil voltage in "START" oscillates my multimeter...all wires appear in good working order. Just for grins I ran jumpers from ignition and solenoid connections to the coil..to ensure proper voltage was getting to the col.
-plugs..all 4 are fuel soaked. I am getting tired of cleaning them.
I know for a fact this thing is drowning in fuel... and I know it will start....it just won't stay running. (when it ran for a few bumps...it sounded good) So...let's just say the fuel pump is putting out too much pressure ( have yet to check) would it flood the carb....(the bowl is only half full at each check) or the manifold like I am constantly experiencing??? It is getting rediculous to keep having to soak up a 1/4 inch of gas out of that @#$@$ manifold every night..and I really want to get on the water.. summer is wasting away. I just give up ..and I don't know what to do next.
john
I was trying to diagnose a non start situation over the last two months after a new head gasket...new starter...carb rebuild...(Mercarb 2bbl) new coil , points, cap, condenser, plug wires. Got the engine to fire but it only lasted a few seconds... (added no gas) and then it would not start again.
I am frustrated to no end..but these are the facts...
The engine started two months ago with the existing mechanical fuel pump...no flooding...no issues ..other than water in the oil from a leaking riser gasket..so to rule out any other leaks..replaced all the gaskets. Now..no leaks... engine didn't hydro lock...mechanically sound.
-each time I have attempted to restart this motor..without adding throttle...the intake floods. I have replaced the needle and seat with the originals, have also gone to the spring loaded needle and seat. Mixed and matched needles and seats. Still...floods the intake. Each time I have pulled the carb apart..the float bowl is about HALF full. Each time I have inspected the carb...the sight tube is CLEAN..no fuel..nor does is smell like fuel. the fuel pump...works, and it seems like the carb is doing its job of halting fuel flow at the top end of the float travel.
-the needle and seats all have not stuck..and seem to close correctly.
-good compression test...
-coil voltage in "ON" is right at 5 volts
-coil voltage in "START" oscillates my multimeter...all wires appear in good working order. Just for grins I ran jumpers from ignition and solenoid connections to the coil..to ensure proper voltage was getting to the col.
-plugs..all 4 are fuel soaked. I am getting tired of cleaning them.
I know for a fact this thing is drowning in fuel... and I know it will start....it just won't stay running. (when it ran for a few bumps...it sounded good) So...let's just say the fuel pump is putting out too much pressure ( have yet to check) would it flood the carb....(the bowl is only half full at each check) or the manifold like I am constantly experiencing??? It is getting rediculous to keep having to soak up a 1/4 inch of gas out of that @#$@$ manifold every night..and I really want to get on the water.. summer is wasting away. I just give up ..and I don't know what to do next.
john