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Best way to I'd a saw block is markings opposite of the intake just above the bottom of the block. Should be stamped in.
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11-21-2019, 11:41 PM
(This post was last modified: 11-21-2019, 11:43 PM by Terry Bentley.)
I know this thread is a over a year old, but the information is still useful.
There are only a couple of possibilities if bore is 2.165". But looks to be one in particular. First this is a very late model block because it has the recessed exhaust gasket. That was was the last variation.
If the block is stamped on left side when turned upside down, the number might be either 68529 or 61406.
It is likely the latest model Super 550 and is 100cc's. An excellent find. If block is stamped will be 68529.
Another less likely possibility would be a model 450. This one is an oddball. It has a 1.500" stroke but has 2.165 bore. It is the only model I am aware of with this combination. Both of these should have ball bearings on both sides of crank, and also tapered pto.
There is always the possibility this block has been bored 0.040" oversize. But being a fixed head model not very likely.