Washers for Cylinder Head Bolts

[bobw]

I’m looking for some washers, part #300399, to go with new cylinder head bolts on my QD-20, hopefully at a better price than $3.00 each at Marine Engine. I’ve looked at Fastenal and McMaster-Carr but can’t seem to find anything comparable to the OEM washers. These measure about 0.28 ID and 7/16 OD. Anybody have a source for these?

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 topic was modified 4 years, 9 months ago by bobw.

[Randy in Tampa]

Do have have an Ace hardware near you?🤔 they usually have something close, they carry alot of odd fasteners etc…

Rotary valve Johnson’s Rule!

[bobw]

Yes, my local Ace Hardware was the first place I looked, since they do have a lot of specialty fasteners. I made a quick pass through there yesterday and didn’t find anything but guess I’ll go take a longer look. Thought there might be another source I hadn’t found yet.

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."

[bobw]

If anyone else cares or happens to be looking for these size washers, I found that a metric M6 washer is equivalent in size to the original factory washer.

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."

[2fast4me]

Bob, have you looked into hardware for Aviation? An AN960-4 washer fits a 1/4 in bolt better than hardware store washers. They also come in AN960L for thin.
Jim

2Fast4Me

[Mumbles]

Find smaller washers with the correct OD and drill them out.

[bobw]

Jim, No haven’t tried the aviation route yet but did some googling after your note and I might try those on a future project. I bought a bag of the M6 washers already and they should work fine – the ID and OD are the same as the factory washers.

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."

[jeff-register]

Bob,
there are uss & sae washers. Next time you may try a nut & bolt business for the sae “thin collar” made washers.

[bob-d]

Boltdepot.com ?
Might want to try. I have used them in the past.
Pretty big selection.
Bob D

[aquasonic]

bobw wrote:

If anyone else cares or happens to be looking for these size washers, I found that a metric M6 washer is equivalent in size to the original factory washer.

Last year I needed two 1/4” washers that were missing from a 1954 Evinrude cowl. Regular 1/4″ SAE washers had an O.D. that was too big to fit into the recess in the cowl. 6MM washers worked. They are a little bit snug on the I.D., but they had the smaller O.D. that was needed.

[Author]

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