1975 25 HP Evinrude Head Compatability

[peterskeeter]

Hello Everyone, I have a 1975 Evinrude 25 I need a head for. The number stamped onto the outside of the head is 318392. I went to a boatyard and found a head that looks the same on the outside, same diameter combustion chamber, but the combustion chamber padding looks slightly different and the number stamped on the outside reads 318393. I do not know what model this head is from, but I'm thinking it is a newer model head. Can anyone tell me what I have and if I can use it? Thanks for any help!
Pete

 

[peterskeeter]

Re: 1975 25 HP Evinrude Head Compatability

Does anyone know which heads can be used other than the 1973-1976 versions?

 

[Chinewalker]

Re: 1975 25 HP Evinrude Head Compatability

Chances are the other head you found is from an 18/20 hp model. Similar motor, but they changed the piston dome and the head to match when they created the 25 from the 22-cubic inch 18/20. They will not interchange - you need a head from a 25, 1973-1976. Earlier 25 heads may work functionally, but lack the mounting bosses for the coils. Later 25s were a completely different motor (31.8 cubic inches).
- Scott

 

[peterskeeter]

Re: 1975 25 HP Evinrude Head Compatability

Thaks for the reply Chinewalker, I guess my search for one of these old heads continues....anybody know where I can find a head for a 1973-1976 25 OMC???

 

[MOTION LINE]

Re: 1975 25 HP Evinrude Head Compatability

you can find one at www.peramoottoripurkaamo.fi or I also happen to have one.

 

[Howard Sterndrive]

Re: 1975 25 HP Evinrude Head Compatability

..anybody know where I can find a head for a 1973-1976 25 OMC???

here's a used one:
http://outboardnuts.com/1975_25_hp_johnson_b5.htm

these dealers show a new one in stock:
SEA WAY MARINE INC
Address: 2501 HARBOR AVE SW

SEATTLE , WA 981262135
Country: UNITED STATES
Phone: (800) 332-0803
Email: pauls@sea-way.com


RAYMOND'S BOAT
Address: 27126 HIGHWAY 5

GRAVOIS MILLS , MO 650373310
Country: UNITED STATES
Phone: 573-372-5115
Email: office@raymondsboats.com


AQUATECH MARINE INC.
Address: 247 BROADWAY ST

QUINCY , IL 623012720
Country: UNITED STATES
Phone: (217) 222-6006
Email: aquatech@adams.net


EAST HAMPTON MARINA
Address: 19 BOAT YARD RD

EAST HAMPTON , NY 119372069
Country: UNITED STATES
Phone: (631) 324-4042
Email: ehmarina@aol.com


EAGLE MARINE INC.
Address: 127 STATE RD

SAGAMORE BEACH , MA 02562
Country: UNITED STATES
Phone: (508) 888-8158
Email: eaglemarine@adelphia.net