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p38js

K91T exhaust help

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p38js

Ok guys, I finally tracked down a Kohler K91T with a retractable pull start for the suburban my daughter and I bought at the big show, I need some help and ideas on what to do about the exhaust.  The block is not threaded and I can not find an adapter that is 1 1/4” between mounting stud centers. I’m thinking I will need to fabricate my own adapter unless you guys have a good solution to my problem.

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Racinbob

I tapped mine to 1/2" NPT, used a short nipple and went to 3/4" pipe. It threads easily and the smaller nipple won't harm a thing. Make sure you take precautions to keep shaving out of the engine. :)

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Lane Ranger


I had one like that threaded at a machine shop  and it cost me $25.   I  did not have a tap for it and my vise and tool bencgh was not adequate to hold in place anyway.

 

 

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p38js

Thank you guys sounds like a good plan, I will look into a tap and check the machine shop.

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Pullstart

Yeah, a pipe tap is a handy tool to have around!  Let us know how it turns out!

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953 nut

You can probably find a good used 1/2" NPT tap on :techie-ebay: , that is where I bought mine.

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p38js
19 minutes ago, 953 nut said:

You can probably find a good used 1/2" NPT tap on :techie-ebay: , that is where I bought mine.

I have been looking at them, probably will order one soon.  Always skeptical to the quality on EBay

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cafoose

I just got a set of pipe taps off eBay looks like this made by Alfa Tools 1/4 to 1-1/2 if you need help with a tap:

image.png.9440fadfd24f04da6e3b418279df9b91.png

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AMC RULES

:confusion-shrug: Pretty easy to do.

But, if you only do one in your lifetime...

the local machine shop is the way to go.   

IMG_7638.JPG.acee4ad4ad7fea140417699f2256cda3.JPG

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p38js
4 minutes ago, AMC RULES said:

:confusion-shrug: Pretty easy to do.

But, if you only do one in your lifetime...

the local machine shop is the way to go.   

IMG_7638.JPG.acee4ad4ad7fea140417699f2256cda3.JPG

But this a great excuse to get new tools past the boss lady

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AMC RULES

:confusion-shrug:  Does she ask you when she needs new underwear?  :ychain:

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953 nut
15 minutes ago, p38js said:

Always skeptical to the quality on EBay

I always buy american made used taps and other tools.

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cafoose
 
oldredrider

NAPA carries that size tap in stock. Not expensive and lasts a lifetime.

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Racinbob
2 hours ago, Lane Ranger said:


I had one like that threaded at a machine shop  and it cost me $25.   I  did not have a tap for it and my vise and tool bencgh was not adequate to hold in place anyway.

 

 

Shoot Lane, you're close enough you should have come over. You don't need a vice or massive bench. It taps very easily. I started with a taper tap and followed up with a bottom tap.

 

1 hour ago, p38js said:

I have been looking at them, probably will order one soon.  Always skeptical to the quality on EBay

That's where I got both the taper and bottom. They were cheap but seem to be good quality. I'm not gonna be doing 100's of them anyways.

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AMC RULES

No need to bottom the tap out...

couple decent threads is all it takes.   :handgestures-thumbup: 

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Racinbob

After I did the first one the taper tap went deeper than I thought it would. I picked up the bottom tap because I didn't think it would. I used it anyways to better hide the 1/2" close nipple. :)

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clueless
12 hours ago, AMC RULES said:

:confusion-shrug: Pretty easy to do.

But, if you only do one in your lifetime...

the local machine shop is the way to go.   

IMG_7638.JPG.acee4ad4ad7fea140417699f2256cda3.JPG

:text-yeahthat:

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