Reply To: 1956 Johnson 30hp Rebuild

[Bob Wight]

olcah wrote:

That makes sense in a rebuild situation. Please let us know how it works. It would be good knowledge for all who work on RD18s.

Olcah – will post a follow-up note next week after the new rod arrives. The crankshaft and big end bearings are the same between the ’56 30hp and the ’58 35hp so just need to verify the ’56 and ’58 wrist pins are the same diameter. Obviously, the ’58 wrist pin is longer with the larger bore cylinders but I’m thinking the diameter should be the same. I like the idea of one large roller bearing on the ’58 small end as opposed to the two smaller bearings on the ’56. Best of all, I managed to find 2 NOS ’58 rods that were half the price of a few used ’56 rods so hope they work.

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
1982 Evinrude 25hp

“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."