1957 Golden Javelin Wrist Pin Bearings replacements

This topic has 8 replies, 5 voices, and was last updated 2 years, 4 months ago by Michael Smith.

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October 22, 2021 at 12:05 pm #248477
Michael Smith
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Rebuilding a 1957 35 hp Johnson Golden Javelin and need to replace the wrist pins and needle bearings.

I have an expert machinist that builds race engines who can replace the needle bearing and wrist
Pins with Bronze Inserts with stainless wrist pins.

Is there any reason why Bronze inserts would not work in a 2 stroke motor?

Mike
October 22, 2021 at 2:52 pm #248482
frankr
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Well, earlier motors such as 1955 25hp did have bronze bushings in the small end of the con rods. They wore badly, which was the reason they went to needle bearings. Yeah, to be fair, they had problems with the early needle bearings also.
October 22, 2021 at 3:09 pm #248483
Mumbles
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The pre ’61 ten horse motors were notorious for wrist pin bushing wear even on 24:1 mix and that’s why they went to needle bearings on the 61-63 motors. Sure, bronze bushings would work but they would probably wear out long before needle bearings would.

https://www.ebay.com/itm/133853581546

https://www.ebay.com/itm/312247689922
October 22, 2021 at 3:15 pm #248484
bobw
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Another option would be to obtain a pair of rods from the 1958 35hp, part #377272. These had a better single roller bearing as opposed to the 2 smaller bearings used on the ’57 model rods.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
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."
- This reply was modified 2 years, 5 months ago by bobw.
October 24, 2021 at 5:31 pm #248570
nj-boatbuilder57
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Interesting…are the ’58 rods the exact same size as the ’57?
October 24, 2021 at 6:22 pm #248574
frankr
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1 user thanked author for this post.

vintin
October 24, 2021 at 7:14 pm #248578
bobw
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Yes, they are the same size and as noted in the table Frank provided, the 377272 rods can be used on the 30 and 35hp OMC motors from 1956 thru the late 1950’s including your ’57 Javelin. I just swapped a set of the ’58 rods into my ’56 30hp. See pic for comparison – note different wrist pin bearings.

Edit – wrong 1958 part number posted in pic – should be 377272.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
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."
- This reply was modified 2 years, 5 months ago by bobw.
- This reply was modified 2 years, 5 months ago by bobw.
1 user thanked author for this post.

vintin
December 2, 2021 at 3:08 pm #250578
Michael Smith
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Thank you!
December 2, 2021 at 3:08 pm #250579
Michael Smith
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Thanks!
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