Mercury 20H pistons and rings

[wynkk]

Hi, I have a Mercury 20H - looking for pistons #726-5052a2 and rings #39-64728.

 

[Laddies]

Re: Mercury 20H pistons and rings

Pistons can be a little tough, but they are the same as a 55 or 55H, I have gotten rings from Hastings, most Mercury dealers a least have rings, what size Std. or oversize

 

[Chinewalker]

Re: Mercury 20H pistons and rings

You can use the "flat top" pistons out of a later model 40-cubic inch powerhead, such as the Mark 35A, c. 1959, and Merc 300, c. 1960.<br /><br />Are you looking for oversize or standard? My '64 parts list doesn't list that as a part number for a 20H piston. It lists piston 726-1611A4 as standard (rings 39-20058), and piston 726-1612A1 as .015 oversize (rings 39-20992). My list doesn't show a .030, but I know they were available...<br /><br />Years ago I bought a Mark 35A powerhead that had been rebuilt with .015 oversize pistons top to bottom. I've long since used the pistons or traded them off, but it goes to show that sometimes you get lucky...<br />- Scott

 

[wynkk]

Re: Mercury 20H pistons and rings

Thank you for your response. I am looking for 30 oversized which are the part numbers i listed. any ideas where i might find some?

 

[Chinewalker]

Re: Mercury 20H pistons and rings

Hi Wynkk,<br /> Try placing an ad on the AOMCI.org site's Webvertiser page. Also, ScreamAndFly.com has a good base of oldtime racers who might have a lead or two. Also, BoatRacingFacts.com...<br />- Scott

 

[Laddies]

Re: Mercury 20H pistons and rings

Try Scottcraft Hydros, I think Dave has had some cast for replacements or go to HydroRacer.Net and ck or put a add on the site