131, if you know this engine go for it before it fails. there are 2 gaskets at the s/c that will leak coolant outside the motor and inside the motor (slowly enough that you will get a low coolant light every 2-3 months) replace these oem gaskets before they cause bearing and piston ring damage. zzp on 28th st at Byron Center Rd will have the gaskets you need. also for I think about 105.00 you can change the oil in the nosepeice and get new case bearings for the /sc.