1956 FD-10 Connecting Rods Interchange

This topic has 4 replies, 4 voices, and was last updated 3 years, 10 months ago by olcah.

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March 2, 2022 at 10:54 am #255507
Mumbles
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I can’t find the original post but a while back someone was going to swap their FD-10’s rods out with some others which had the same part number on them but were physically different from the originals. This old service bulletin from 1960 explains why.
March 2, 2022 at 11:15 am #255511
Bob Wight
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US Member
Interesting – thanks for sharing.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."
March 3, 2022 at 8:48 am #255552
labrador-guy
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Interesting, lots of engine builders might disagree. I know people that weigh every similar component and every moving part for consistency. For a daily runner those fat rods will probably work just fine. Mumbles what year did OMC start using a needle bearing in the piston pin on the FD motors?

dale
March 3, 2022 at 11:47 am #255556
olcah
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Mumbles,

I am the guy that noticed the differences. Really appreciate you posting this!
March 3, 2022 at 12:04 pm #255557
olcah
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In 1957 when the 15 HP motors grew to 18 HP OMC put needle/roller bearings at the rod big and small ends and crankshaft bearings.
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