K-321a
 

I'm currently going to rebuild my kohler in my 149 and have a few questions if someone could help me out. Here it goes:

Does anyone know where I can get the exhaust piece between the jug and the muffler?
Is it just a piece of black pipe and if so does anyone off hand know what size the threads are?
I'm assuming for removal I'll have to heat it up cherry red and let cool for removal, is this correct or does anyone else had suggestions?

Thank you very much!

Ed

Our sponsors listed at the top of the page should be able to help you out with the exhaust elbow. As for removal, a torch might be your best bet, if you are not able to get it to move with a large pipe wrench and Penetrating oil.

That would be 1" Pipe Thread

Just a quick word leave the engine bolted in the frame while trying to remove said exhaust nipple. Also use a pipe wrench with a leverage bar on it as well. Trying to hold a loose motor while attempting to remove exhaust is rather challenging. A good bite with pipe wrench and constant steady pressure should do the trick for you. You may want to remove the cast grill housing before doing this. Good luck

Thank you for the responses, I have a few other questions to along with the first.

How do you clean the fins on the head, do you use a small wire brush or use something else? The fins on the jug also need cleaning and not sure if this would be the same procedure or to use something else.

I know not to paint the head but do I paint the jug?

Thanks for all the responses!

I used a thin wire wheel in my drill to clean the fins on the head and jug. Painting the jug won't hurt anything. The paint will eventually burn off anyway. I also have a small bead blaster that fits on my work bench and I used it to help clean up the head too.

Thank you much will give it a try. Has anyone tried the high temp paint for the jug?

K-321a
 

Don't forget, there is a lock nut on that exhaust nipple that locks it to the jug. You must loosen that before removing the exhaust nipple. As for paint, I used high temp black, the stuff for painting gas/charcoal grills.

Absolutely use a high temp paint- exhaust, engine or bbq grill paint.

Not fun, but doing all that work I would remove at least some of the cast flashing left over between the valves and jug. I used some small files and while I didn't do 100% job.. it so much better.


Michael

I'll take a look at her, I wanted to get the core components of the 149 in full operation and hopefully next winter I can strip her and paint. Need her for the garden this spring and mowing all summer. I pulled the motor apart yesterday and man those rings were way out of tolerance! The gap was close to .090 surely were tired. Ordering a rebuild kit from the bay and can't wait to get her back together. Have to replace the driveshaft as well, heavily worn due to the pin breaking on one side. I'll keep everyone up todate on the rebuild.