Sparks but no fire!

R

redart

Seaman Apprentice
Joined
Jun 6, 2010
Messages
31
Hi,
Am having trouble starting a '81 Johnson 6 hp. I have sparks on both plugs when held against the block, and fuel going all the way up to the carb. What I don't have is any sign of life when I pull the starter rope. Not even a cough, sneeze or splutter. I tried squirting some fuel into the choke butterfly valve, still no joy, not a pop. The sparks I'm getting from the original plugs (L77JC4) look pretty weak - thin and white/yellow in colour. Could it be as simple as needing new plugs, and if so, which ones?. Any other suggestions on what to try next would be much appreciated.
 
A

AlTn

Commander
Joined
Mar 9, 2010
Messages
2,813
Re: Sparks but no fire!

possible sheared flywheel key....while you've got the flywheel off, clean and adjust the points
 
Rscardina

Rscardina

Chief Petty Officer
Joined
May 3, 2010
Messages
513
Re: Sparks but no fire!

i agree it could be but before i go taking off the fly wheel ill usually spray some starting fluid into the heads..no much just a squirt.. ill sand up the plugs to be sure they are good and clean..and then try her...

after she runs a little i stop it and take the plugs out again...and check spark one more time.. i do this becasue its possible a little rust can build on the magnets and cause a weak state.. especially it it sits and such..

worst case, take the flywheel off and inspect..if things look dirty or rusty give it a good sanding and try again..

good luck
 
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