Coil?

ahamay

Cadet
Joined
Sep 5, 2010
Messages
12
Ahhh. Duck season almost here and wouldn't be duck season without outboard problems. So I have a 25 hp Johnson 25r74w. It starts fine and idle ok. Went to wot and nada. Wouldn't go. Top plug not firing. Top coil I think is bad. The reason I think it's bad is u can wiggle it up and down . Like its loose on the metal part that runs thru it and mounts to the motor. It also has some other issue where someone cut a wire coming out of coil and it's spliced together with a elec. twist cap. So I need a new coil regardless. But would this seem right why the top plug isn't firing? Bottom coil is new and it's solid on the mount. No wiggle.

And what would the part number be for that coil. I'm having a hard time finding it under 25hp. Shows a 1974 15 hp but I can't find a 25 hp .

Thanks
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: Coil?

Try shop.evinrude.com with the correct model # and you should find your parts there.
 

JDusza

Ensign
Joined
Apr 21, 2009
Messages
997
Re: Coil?

Swap plug wires. See if the top plug fires.
Top cylinder fires: coil.
BRP shows 1974 as 25R74M..... I'll bet that your ... nevermind.
Coil # 0581370.
J
 

ahamay

Cadet
Joined
Sep 5, 2010
Messages
12
Re: Coil?

Thanks. Put on new coil and new plugs and it's running great. Thanks
 

ahamay

Cadet
Joined
Sep 5, 2010
Messages
12
Re: Coil?

Swap plug wires. See if the top plug fires.
Top cylinder fires: coil.
BRP shows 1974 as 25R74M..... I'll bet that your ... nevermind.
Coil # 0581370.
J

I guess it is a m. Could be either. Wasnt looking upside down . To my eye it looked like a w. letter design bad
 
Top