Jump to content

Piston needed


Guest
 Share

Recommended Posts

I need to replace a broken Jahn's piston: 3.25 inches in diameter; 2.4675 inches compression distance; .875 pin size - for a Series 9 1917 Franklin. Does anybody have a piston and rings that will work for sale? I am desperate, even an old original may work. Warsaw, Indiana confused.gif" border="0

Link to comment
Share on other sites

I have a couple of old Franklin buddies who tell me the trick with Franklins is the pistons must be cam ground eliptical not round. Reason is cooling blower pushes air across cylinders from only one direction and when hot the cylinders warp out of round enough to bind up a round piston.<BR>Some guy in Minnesota reproduced Franklin pistons with invar? struts. Air cooled is a different game than water jacket engines.<BR>Stude8

Link to comment
Share on other sites

I tried Egge earlier to no avail. The Jahns pistons are heavier. Tom Rasmussen is trying to find one. I may have to find any 3.25 piston and add weight to the pin to balance out the engine. Compression clearance is not as critical as weight.This is my first Franklin, so it is new to me too.

Link to comment
Share on other sites

  • 4 weeks later...
  • 4 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...