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Spark Compression Good Fuel PumpNo Go

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ford77

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" I have a 1980 Johnson 35 HP.

" I have a 1980 Johnson 35 HP. I rebuilt the carb, replaced the fuel pump,the plugs, and the head gasket. It was running before but not real good. So anyway, now it will start, run for a few revolutions, and then die. Sometimes it pops when it dies, sometimes not. The compression is at about 145 psi for both pistons, there is good spark at the plugs, and good fuel supply from the pump. Is it in the carb or what. Im at a loss at the moment. Any ideas???? "
 
Sounds like carb adjustment t

Sounds like carb adjustment to me. Maybe someone will give you the init. carb adjustment specs. If you have a repair manual follow the carb. adjust specs.
 
" 1977 Evenrude, 25 HP - How c

" 1977 Evenrude, 25 HP - How can I determine if one of the spark plug coils or power pack is weak? The engine smokes some. When I take off coil lead from #1 (top) spark plug the engine runs the same. After reinstalling #1 coil lead to spark plug I removed #2 coil wire from #2 spark plug and the engine dies. How can I determine if it is a spark plug coil or the power pack? "
 
" George,you need to do the ba

" George,you need to do the basics.Check compression.You can swap the coils and see if the fault follows the coil.You can check the spark strength ,It must jump a gap of 3/8",anything less is a problem.You may also have a broken/held open reed valve. "
 
" I AM HAVING ABOUT THE SAME P

" I AM HAVING ABOUT THE SAME PROBLEM
1977 I THINK. MERC-850-85HP I-4 NO DISTRIBUTER, 2 CARBS.
IT WAS HARD TO START LAST WEEK WHEN I TRIED TO START BEFORE GOING FISHING.CHANGED PLUGS RAN FINE,WENT FISHING RAN FOR ABOUT 30 MINUTES,GOT READY TO GO HAD IT IDLEING WHILE PULLING ANCHORS AND IT SHUT DOWN AND HASNT STARTED SINCE "
 
"To All New Users.... Posting

"To All New Users.... Posting Entry Button:

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(MarineEngine.com - Properly Inserted Post)

Go back to the previous page where the various topics/questions are posted. Scroll down to the extreme bottom of that page.

There you will see a large button that is entitled "Start A New Conversation" or something of that nature. Click on that button and you will be able to have your post listed under your own topic which will be inserted at the top of the page.

As it stands, your post is buried under someone elses topic which started at a prior date and/or time.

HINT: Click anywhere on that page whereas the click won't initiate anything, then hit your END key. That'll drop you to the bottom of the page immediately.

Joe

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