Left Hand Starter Nuts

[Gerald RevelyParticipant]

We have left hand engines and are using two piece starter nuts similar to the old Horstman or GEM Products nuts. The nuts fit Yamaha KT100, Komet piston port, Comer P50/P51 and Parilla reed jet among others. However, this product is scarce since both suppliers quit making them years ago. What are you using and where are you getting the product? We are running out of them as they age and wear out or break. Thanks.

Jerry Revely

[John MulvihillParticipant]

A regular nut (or a longer coupling nut) with blue Loctite will work.  Make sure that it is tight enough and occasionally re-tighten.

Red Loctite can screw-up threads since it is supposed to be permanent.

I’ve been forced to use the bottom half of two piece starter nuts many times and given proper tightening and blue Loctite I haven’t had problems.

John

 

[Gerald RevelyParticipant]

Thanks for the tip John. I have heard of people doing that but I don’t trust that method. I just bought 3 more of the two piece nuts I wanted so we are set.

Jerry

[Walt GiffordParticipant]

Unless the left hand nut tightens down on the end of the shaft it’s not doing anything more than a regular right hand starter nut.

Gif

FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience

[Gerald RevelyParticipant]

The left hand nut does tighten against the end of the crankshaft so it keeps the right hand threads on the bottom part from unscrewing. That is way more reliable than blue Loctite. Both work but I would rather trust in the method we use.

Jerry

[John MulvihillParticipant]

Blue Loctite and a left hand nut!!!!!!

[Author]

Posts