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joegrgraham

Merry Tiller engine question.

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Evening all, 

I am asking this on behalf of a friend who is starting to annoy me with constant questions!. 

He is trying to revive a Merry Tiller Super Major, bought new in 1986. Believed to be a 5hp.

It needs new piston rings. 

Now, the cowling bearing the serial number has been lost(originally a black cowling) the cowling it is wearing in the pictures is from a VISUALLY identical engine. The serial number from the donor engine has been fine for Carb, exhaust etc, but it turns out that it has not worked for the rings! 

The original engine (fitted to the machine) has a bore of 65mm/2.55'',whereas the donor has a bore of 63mm/2.48''.

He is stuck now as the B & S manual only gives part number reliant on the serial number, not the actual ring dimensions, likewise, the parts suppliers all need the serial number. 

He wants to retain the original engine as it has the built-in reverse gearing. 

Any help in any form would be greatly appreciated. 

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