2QM15 Engine Zinc

[rpowell]

Our "new" 1980 Irwin 30 is powered by a 2QM15. The engine zinc appears to be located facing aft under what appears to be a large square head. I haven''t been able to replace the zinc, because I can''t turn the square cover. What am I doing wrong?

[RichH]

Not applying enough torque to remove the zinc pencil from the heat exchanger. ..... get a bigger wrench (not an adjustable wrench). Try tapping the wrench with a hammer in clockwise (tightening) direction a bit before turning it counter-clockwise (loosen).

[tsenator]

RichH, I had a 2QM15 in my old boat and this is a raw water cooled engine. It doesn''t have a heat exchanger, the zincs are bolted right into the engine. But I agree with you solutions to remove the bolthead. Just keep working on it. It should come out.

[rpowell]

Thanks.... any idea as to the size of the bolthead... its larger than my 17mm wrench.

Bob

[tsenator]

Hmmm....can''t recall. Get a caliper and measure it. Then go to Sears and get the exact closed and boxed end wrench. It will be worth the extra cost

[rpowell]

Finally got this job done last Friday. The cover nut takes a 22mm wrench. After liberal doses of PB Blaster & tapping it came off by hand!! Thanks for your help.

[captaindavid]

Does anyone know where to get used parts for a 2qm15, I need rods. Please email me if you can help Davidjnathan@hotmail.com

[captaindavid]

Does anyone know where to get used parts for a 2qm15, I need rods. Please email me if you can help Davidjnathan@hotmail.com

[gunnyman]

Pull up Mack Boring they are the east coast premier Yanmar dealers. Great people and they will take care of you.