How many PSI for an 8hp Yam twin?

hobnob · 11 August 2007, 12:19

Hi

I am just about to view a number of ex-sailing club 8hp Yam twins. They are 250-500 pounds depending on condition. It will be for my new SIB.

Pre-purchase checks will include a look-over, test run, and also compression test. What sort of PSI readings would indicate an engine with healthy internals?

Thanks!

Tim

Tims Osprey · 11 August 2007, 13:21

Try this site http://www.outboardrepairs.com/compression/

hobnob · 12 August 2007, 13:04

Quote:

Originally Posted by Tims Osprey

Try this site http://www.outboardrepairs.com/compression/

Thanks. Seems over 100 PSI is good and the cylinders should be +/-15PSI maximum.