engine dies @ idle/bogs @ WOT '78 140hp

[warrior1]

howdy, my engine bogs @ WOT or anything above the high idle for warmup.
when i try to shift into gear the engine dies. it is a trick to start it and then shift and then get on the gas.

when @ WOT it just sputters and coughs and tries to die. when you throttle back down just a bove idle and then throttle up quickly, it tries to rev up but then bogs again.the boat wont move but about 10 knots.

engine also starts hard. i have to use ether to start when cold. but when warmed up, will start at high idle only.
there is fuel coming from the air silencer. i removed the silencer, and it seems to be coming from the drain hose that comes from the base of the reed block.( i guess its a drain hose. its on the lower port side of the black plastic air cover/silencer.)

i have fuel pressure at the carbs. when i crack the lines, the fuel sprays out.

so, is it carbs, i dont think its a matter of timing because i have the excess fuel leaking out. are the carbs letting in too much fuel and killing the engine?

 

[Joe Reeves]

Re: engine dies @ idle/bogs @ WOT '78 140hp

If you're going to spray anything into the carburetor throats, DO NOT use starting fluid (ether) as it has no lubrication qualities. Use some premix fuel (gas/oil) in a spray container.

Remove, clean, and rebuild those carburetors, using complete carburetor kits.

 

[warrior1]

Re: engine dies @ idle/bogs @ WOT '78 140hp

roger that -

no ether.

i swapped out carbs from an 85 140 (that had a thrown rod) and my engine started on the
2nd turn of the key. amazing.
it idles now.
smokes a lot less, and i can also put it in gear at idle!!!

i am on my way to the shop to get the full rebuild kits for the original carbs.
i will rebuild those since they are out and on my bench. i will run it today with the swapped carbs, and then probably put the rebuilt ones back on the engine in a few days.

thanks for the help! god i love these forums.