Pistons 20/40 CI

Mercury Outboard  general discussion

Pistons 20/40 CI

Postby AU52N » Fri Mar 08, 2019 9:38 pm


For all the folks that run 20/40 cubic inch Mercury engine the issue has been finding pistons. Today I committed to Wiseco on a replacement piston program. The engineering drawing is done and the next step will be to manufacture the forging die. Once that is done I will have a preproduction run of 50 pistons done. They will be two ring design and be available in std, +.020” and +.040 oversized. Special order sizes will also be available in +.015” and +.030”. They will be two ring design with all the latest coatings. The piston will come with rings, clips and light weight pins and is projected to cost less then $130. I expect to have them in 8 to 10 weeks.

Alan Van Weele
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Re: Pistons 20/40 CI

Postby AU52N » Sun Oct 06, 2019 8:07 pm

We got word from Wiseco that the 20/40 CI pistons will be delivered on Wed. Oct 9.  They are available in Standard size, 0.020 and 0.040 over size.  The will be complete with pins, rings and I believe clips.  They are the 2 ring version and will sell for $145 plus shipping.  As soon as we get them I will try to post pictures.
David
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Re: Pistons 20/40 CI

Postby Hank1995 » Mon Oct 07, 2019 2:03 pm

I have these! I've had these for sale for  a year now - 0.020" oversize from Wiseco. I've advertised these here and on ebay. Haven't sold one!  Cost me $1500!
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