acutron
Aluminum
- Joined
- Sep 1, 2006
- Location
- Buffalo NY
Hello Everyone,
I am getting ready to bore a 6hp ohv Briggs engine .020 over. The model# is 120412. The problem I am having is determining the piston to bore clearance. The manual says to take .020 for a .020 over piston but gives no numbers on clearance. The standard bore is 2.6875 & .020 over is 2.7075. The new piston is marked .020 on top & measures 2.705 @ the skirt& this seems a little tight to me. I have called Briggs & they were no help. If anyone has thoughts on this I would greatly appreciate it. This has an aluminum bore also. Thanks, Tom
I am getting ready to bore a 6hp ohv Briggs engine .020 over. The model# is 120412. The problem I am having is determining the piston to bore clearance. The manual says to take .020 for a .020 over piston but gives no numbers on clearance. The standard bore is 2.6875 & .020 over is 2.7075. The new piston is marked .020 on top & measures 2.705 @ the skirt& this seems a little tight to me. I have called Briggs & they were no help. If anyone has thoughts on this I would greatly appreciate it. This has an aluminum bore also. Thanks, Tom