Mercruiser 3.7 distributor & fuel pump questions

[spareparts]

you got valve seat issues, go ahead and pull the head. Look real good at the riser to make sure its not burnt out and leaking water back into the manifold

[gw204f]

Thanks.

For the distributor shims, would these be correct?

http://www.summitracing.com/parts/MOR-26140/


I've also found three different part numbers for the riser gasket on Merc's parts express. 18272 and 97542, which is superceded by 856705. Do you know which one is correct?

I am assuming it's 18272 as it has only has one scalloped side.

18272


97542/856705



Thanks for helping me figure this stuff out!