TOPIC: 64-69 Merc 350 Reed Valve Question

Hey - I've noted a reed valve part number change and I'm looking for guidance. From 1964 thru 1967 the reed valve part # is A-34-32203A1. In 1968 the part # changes to A-34-45506A1.

Here's my question/s. Was the latter (68-69) reed a percieved as an improvement over the former (64-67)?

Will the reeds safely interchange? Specifically the earlier reeds in the later motors? According to my cross-referencing this the only part number change I've noted regarding the entire main bearing reed valve assembly.

Except for the reeds, all part #'s are the same from 64 thru 69.

Thanks and I hope my inquiry seems reasonable and concise.

Mike

I 'think' that the earlier model had a bronze set of reed blocks, where the later model had aluminum reed blocks.
I can not answer whether or not the earlier reed pedals - valves - are the same size or not in comparison to the later reed pedals.
If you find that there was an inline-6 that used those early pedals, I most likely can dig some out and compare sizes & shapes to the later ones.
I see that the 1000ss also used the later 533-2761A2 blocks, so if using those (aluminum) a set of Boyesen fiber reed pedals are still available to purchase and would be a bonus to use if you are going to be doing a full disassembly-reassembly of the powerhead.
If you get that deep into the beast, be sure and inspect the reed blocks labyrinths for excessive wear & replace the blocks if you see they are obviously worn. Not usually an issue in a 2 cyl, but something to look for.
I most likely have good used sets if needed.
Doc

Thanks Doc - that was the weathered input I was hoping for. Chris Carson Marine Service also stocks the fiber reeds for 64-69 Merc 350. Agreed, while reeds and related parts perform a bizillion times seemingly without flaw, they can and do fail. A sucked reed is costly.

"Agreed, while reeds and related parts perform a bizillion times seemingly without flaw, they can and do fail. A sucked reed is costly."

I was just referencing the reed blocks & their labrinths not wearing out. I definitely agree with replacing the reed pedals.

doc

I've only noted raves about Chris Carson's reed valves across the www gamut. Care to offer your thoughts on CCMS reeds?

Chris Carson is held in high regard over at Scream and Fly. He's the go to guy in south Florida.