weak spark on no 2 plug

[Bandit0014]

Hi peoples took my motor for a tune & was told it has weak spark on no 2 cylinder no 1 &3 have good spark & they said the compression check came back with 150 in each cylinder i noticed the coils had cracks & replaced all three with no improvement could it be the stator still starts & runs its a 1973 65hp evinrude triumph model no 65373R cheers any help would be good & a place to buy a new stator for it in australia i can get a second hand stator for $140 is that cheap

 

[Joe Reeves]

Re: weak spark on no 2 plug

If the stator was bad, you would not have good spark on any cylinder. Check the spark yourself, the spark (with the spark plugs removed) should jump a 7/16" gap with a strong blue lightning like flame... a real SNAP!

Unless that stator has cracks that is allowing a sticky looking substance drip down on the timer base and powerhead, I would assume it is good.


Check all connections pertaining to the ignition... loose, tight but dirty, poor grounds, etc.

 

[Faztbullet]

Re: weak spark on no 2 plug

It could be a problem in pack. This pack has a single capacitor to to fire the coils so if you had a damaged SCR or solder connection, it could have weak output to that coil and others OK. You can test the output to coil with a meter and DVA adapter.

 

[Bandit0014]

Re: weak spark on no 2 plug

Thanks guys i went over the motor today & found alot of resin from the stator is sitting on the top of the block melted so i,d say it could be it

 

[Joe Reeves]

Re: weak spark on no 2 plug

Make sure that it is leaking from your present stator.... and NOT from a possible previous stator.

If from the present stator, then replace it regardless. I've never seen a failing stator affect just one clyinder though.

 

[boobie]

Re: weak spark on no 2 plug

I vote for a bad pack or sensor but it should be checked out with a peak reading or dva meter.