Been running a Shetland Cadet for fishing playing etc for ten years with a faithful Mariner 60HP. Always maintained and serviced it is in great condition. Then earlier this year whilst skiing with my brother, one of the pistons let go. I have been told that this is a common problem with theses engines. My problem now is how to resolve? Consulting the workshop manual I think i can rebore the scratched cylinder and replace with an oversized piston.... Or purchase a new block...? Can anyone confirm my suggestions? And if so can they point me in the right direction for the most cost effective solution..
Many thanks
Your best bet on this AGE of OB was too try and sorce the part's in the USA . Going thru Barrus or any local dealer will cost you a fortune . and looking at your serial number Im pretty sure this is a clam shell OB and if you were to go OS you would need to go .30 oversize . Sutton rebores in LONDON do all my oversize stuff and are pretty good . I just send in the piston and block together and they do the rest .
Great info thanks - the workshop manual says that I only need to rebore the damaged pot and the OB will cope with one oversized piston ..? So do you send oversized piston and block together ? And can you point me in the right direction for the piston.
Many thanks
My boring man will be not much use to you, as you are at the other end of the A1, however I ended up using Mallory Pistons, which after a lot of googling, appear to be equivalent to the latest level of the pistons for that machine, but at almost the cost of one Merc piston for the set of three!
will be not much use to you, as you are at the other end of the A1, however I ended up using Mallory Pistons, which after a lot of googling, appear to be equivalent to the latest level of the pistons for that machine, but at almost the cost of one Merc piston for the set of three! 
