Differences in size of overflow plugs for Renown engines

steamyman · Differences in size of overflow plugs for Renown engines

hi ,

Tony Muir recently made me a repro plug(with 2 bits out the size)

but unfortunately its too small.

the plug on right is correct size for my engine.

xlchainsaw

perhaps someone used an oversize plug on yours years ago when they couldnt get a replacement. after all ive found some weird and wonderful filler plugs in my te s when i got them

steamyjim

tmuir

It looks like Clintons OF plug is 3/16 but its hard to say could be 1/4.
Certainly never came across an engine before with anything other than 1/8 BSW thread for the overflow plug.
I'm guessing it was changed in the past by someone who lost the original but as the history of Renowns is a bit sketchy just because this is the only one we've seen doesn't mean its not original although I can't see a reason why they would make it a different size.

Either way I'm getting Clinton to send the plug back to me and I'm refunding his money, no point him having something he can't use.

Nick

Are you making a new one with threads that match Clinton's?

You could have him send the correct size one back with the one you made, and make a new one.

By the looks of it, when screwed in, it wouldn't even be noticeable.

tmuir

I don't know what size Clinton's is I'm only guessing by the photo and without knowing the correct size I can't make it.
I also don't have a 3/16 die (If it is that size) which would cost me more than the price of the part.

The only way I could guarantee to get it right would be for Clinton to send me the engine and at about $18 postage each way and if I need to buy a die especially to make it for him I would have to add that to the cost all of a sudden its gotten very expensive for him so I doubt he would be interested in that.