77 25hp rude coils

Larry Glady

Seaman
Joined
Apr 8, 2011
Messages
71
lost some power checked for spark, upper cyl has no spark and there is some arcing at the lower coil prob the only cyclinder firing should just replace both coils?? Thanx for any help Larry
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
Re: 77 25hp rude coils

I'd replace both coils under the circunstances. Possible bad power pack.
 

Larry Glady

Seaman
Joined
Apr 8, 2011
Messages
71
Re: 77 25hp rude coils

thanx, do you guys have any preference on which brand to order one brand is $10 more than the other 2 cdi mallory& sierra maybe no big deal ??? Thanx again Larry
 

Haffiman

Commander
Joined
Dec 17, 2009
Messages
2,454
Re: 77 25hp rude coils

I would go OEM or CDI. As mentioned above, change them both as a pair.
 

Larry Glady

Seaman
Joined
Apr 8, 2011
Messages
71
Re: 77 25hp rude coils

thanx for the help guys I ordered 2 oem coils today that should make a big difference ha ha at first I thought I was havin carb problems i cant believe it ran that good on one cyclinder i'll let u know how it works out Larry
 

Larry Glady

Seaman
Joined
Apr 8, 2011
Messages
71
Re: 77 25hp rude coils

well still no spark on #1 after new coils Why didnt i order a power pack when i ordered the coils anything else to look for? should have done a better job testing things out F R u had it right but #2 coil is not arcing now so probable not a bad investment on the coils they look like original.... thanx Larry
 

Larry Glady

Seaman
Joined
Apr 8, 2011
Messages
71
Re: 77 25hp rude coils

#2 coil was the coil that was arcing and blew out #1 side of the power back does that make any sence Hman? no matter need new power back agree??? probably order 1 tomorrow waste $10 shipping dang!
 

Haffiman

Commander
Joined
Dec 17, 2009
Messages
2,454
Re: 77 25hp rude coils

Arching coils may send 25++K Volts into the primary of the powerpack and then it is goodbye!!
 

Larry Glady

Seaman
Joined
Apr 8, 2011
Messages
71
Re: 77 25hp rude coils

i guess thats what happened i thougth it would blow out the whole thing not just 1 side thanks for your help
 

Haffiman

Commander
Joined
Dec 17, 2009
Messages
2,454
Re: 77 25hp rude coils

i guess thats what happened i thougth it would blow out the whole thing not just 1 side thanks for your help
It normally blows out a 10cents diode if you buy it at Radioschack, but a bit 'tricky' just to replace as it is all bedded into epoxy!!
 

Larry Glady

Seaman
Joined
Apr 8, 2011
Messages
71
Re: 77 25hp rude coils

new power pack today and spark at both coils shew!!! maybe get her in the river tomorrow thanx haffiman and F R>>>>
 
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