1973 evinrude starflite 115hp spark

DonnyDrywall

Cadet
Joined
Apr 22, 2014
Messages
9
My buddy has this motor and it only has spark with all the spark plugs removed. we need some guidance. thanks
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,578
Look into / inspect the starter motor , battery and battery cables.----Do not rush out and buy new , inspect first.
 

DonnyDrywall

Cadet
Joined
Apr 22, 2014
Messages
9
what should i be looking for? i read something somewhere about 350 rpm for it to make spark. we tried leaving one plug in with a test light in line but it wouldnt spark at the test light or timin g light, then with all out and a timing light on number one wire we had spark with the timing light.
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
You have one of two related possible problems.
1. Starter is not cranking it fast enough (it cranks faster with plugs out)
2. Stator charge coils are shot. A big clue is if they are leaking goo.
 

DonnyDrywall

Cadet
Joined
Apr 22, 2014
Messages
9
Okay he put a new CDI stator on it. We were thinking having only one plug in would allow it to spin fast enough but I guess on sealed cylinder is still a significant amount of pressure. We are going to clean all cable ends (battery, starter, and solenoid) and see what happens.
 

DonnyDrywall

Cadet
Joined
Apr 22, 2014
Messages
9
we cleaned and wire brushed every terminal (battery, starter, solenoid) and now it runs great. he says its never idled so smooth or started so easy. Thanks guys.
 
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