Lockwood 72T Muffler shell bolts

[T….in Wisconsin]

Need help with dimensions for these 2 bolts. They are slightly different in length from side to side. I plan on having these bolts made locally. Hole OD on my muffler shells is 5/8″, although some were 1/2″ depending on mfg. date.

Attached picture is that an AOMCI member who has made his own.

Those listed on ebay are of the same length. I may end up buying them just to have something to work from.

Any help greatly appreciated.

 

[jeff-register]

Tim,

I know nothing about your bolts, but, a guy can buy tools for measuring threads & bolt diameters, even thread chasers for repairing threads will function. I used thread chaser tools on many Mrcury internal gearcase threads to repair tthem, a common tool.

[joecb]

The  e-bay bolts look to be nothing more than standard hex head hardware bolts with a tubular bushing slipped over…. might be a functional replacement but far from original looking.

Unless memory fails me ( not unusual) there was an article in the “Antique Outboarder” years ago about these bolts, with dimensioned drawings.

Joe B

[T….in Wisconsin]

Thank Joe.

Being I have the Muffler Shells, it may be easier to reverse engineer the bolt for dimensions.

Thread length would be thickness of mounting flange and a few extra threads.

Mine has 5/8 dia muffler shell holes.

I like the member design, just need to figure out a few dimension to it, not a biggy. Lol, I’ve said that before!

[David Bartlett]

Tim,

this is from the July 2010 issue of the Antique Outboarder.

It may or may not be helpful.

David Bartlett
Pine Tree Boating Club Chapter

"I don't fully understand everything I know!"

[jeff-register]

Tim,

I see from the drawings these bolts are 1/4″ X 28 threads per inch.  That thread is just a common 1/4″ fine thread, very easy to find.

[joecb]

Thanks  for posting, David… my memory didn’t fail completely this time

Joe B

 

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David Bartlett

[T….in Wisconsin]

Good find, I’ll check out the article.

I see it was noted the mounting flanges were prone to stripping and breakage.

Using a threaded stud and altered bolt design shown in the article is a good idea.

Thanks for finding!

[T….in Wisconsin]

Dave, did you find this article on this site somewhere.

I’d like to read the entire article and I Don’t see where it’s available in the Antique Outboarder Archives.

T…in Wisconsin ” My first idea is rarely the one used”

 

 

 

[David Bartlett]

I have the issue. I can copy it and send it to you. PM me your address or email as it’s only 2 pages. I could probably just send you a scan.

Dave

David Bartlett
Pine Tree Boating Club Chapter

"I don't fully understand everything I know!"

1 user thanked author for this post.

T....in Wisconsin

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