Transom clamp bolts

[kbh121956]

Hello group, Just wondering if the transom bolt pattern are the same on all outboards? I know the both Chrysler and Force outboards use the same bolt pattern. Also, if they are different what is the best method of filling the old holes? Thanks.

 

[jerryjerry05]

The bigger Yam,OMC, Mercury use the same pattern.

I use a hardwood dowel.
If the holes are in good shape, you can just fill them with out any prep.

I usually re-drill to the next larger size so the edges are crisp/clean.

Any moisture at all, you need to dry the transom,.can take weeks and weeks??

I cut and pre-fit the dowel to be just undersized by 1/8" on both sides of the hole(if both sides are visible??)
Then fiberglass resin(make it hot for a quick dry) put it in the hole and on the dowel.\
Insert and wipe off excess and let it dry.
Then sand smooth.
Then a small jar of Marine-Tex to fill the hole and let it dry, sand/smooth.

I use a sandwich baggie cut in half or plastic film and taped over the patch.
Makes it dry quicker.

Take pics and post as you proceed.

 

[kbh121956]

Thanks again Jerry. I will use the hardwood dowels. This is going on a old StarCraft boat that has an aluminum hull. The old mercury is too pricey to get up and running. It will end up with a Chrysler when I'm done. I can't post pics and photo bucket is a 300 dollar a year fee!

 

[VivaLaMigra]

The current "BIAA standard" pattern actually originated in 1958 with the OMC "Fat Fifty!" Those brackets that bolted to the transom into which the motor slid were the same pattern as the later OMC's whwn they eliminated the separate brackets. Merc didn't go with that pattern until the 1980's. Chrysler of course never did; all their motors were clamp on's even the monsters. Force changed that to bolt-on on the big models.. An old Chrysler 35, 45, or 55 can be retrofitted to the standard by using the transom assembly off a 1990's Force 70. Check one out and you see it's sort'a like a Chrysler or Force but then flares out to be as wide as the standard bolt holes. Why US Marine didn't do that years back, I'll never know. A good TIG welder could fabricate it like that.

 

[jerryjerry05]

Shutterfly or some other site offers free pic sharing.