Home › Forum › Ask A Member › 1957 Evinrude Big Twin-Frozen Flywheel-UPDATE › Re: 1957 Evinrude Big Twin-Frozen Flywheel-UPDATE
July 12, 2015 at 9:59 pm
#19976
If the rings are lightly rusted to the bore, you MAY be ok. If the bearings and such in the powerhead have rust, she must be opened up to repair. OR a donor powerhead will need to be found.
Lay the motor so that the spark plug holes are facing up. Pour some acetone/ATF oil mix into the bore, and let it sit a week or so. Then try moving it again.
As Wedgie stated though, very often in these situations there are other issues in the powerhead that need attention.