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1960 Suburban 400


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#1 OFFLINE   eibbed

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Posted 05 March 2011 - 03:42 PM

:thumbs:
I have an opportunity to purchase a K91 T 557290 Spec. NO. 31497A for my 1960 Suburban 400
Is this the correct engine for it?
:thumbs:
Dave

#2 OFFLINE   racinfool40

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Posted 05 March 2011 - 05:38 PM

going by the manual for the 400 suburban it list only one spec# 31388a but has been wrong before..Someone who knows more about these tractors should be along shortly to clear it all up..
the spec #you listed should be close31497a:
walbro carb
fairbanks morse recoil start
coil magneto ignition
as far as I can tell from the Kohler manual???? :thumbs: :thumbs:
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#3 OFFLINE   sorekiwi

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Posted 05 March 2011 - 06:35 PM

My listing agree's with what Mike just said.
Mike in North East Ohio

#4 OFFLINE   MikesRJ

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Posted 05 March 2011 - 07:38 PM

Both my sources say 31388a as well.

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#5 OFFLINE   Kelly

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Posted 05 March 2011 - 07:43 PM

I say buy it and use it till you find the correct one, that may take years to find, enjoy it now, it's only a few bolts and most people will never know.

#6 OFFLINE   eibbed

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Posted 05 March 2011 - 08:29 PM

I just got back from looking at the motor. Unfortunately it wasn't in the condition as I was told, so I didn't purchase it. I already have some 4HP Kohlers, but this one was supposed to be like new, supposedly never having had gas run through it. Not so!

Most of the four 4HP Kohlers I already own are missing their tins, or don't have the identification tag, so I don't have any numbers to go by. They also have different size diameter crank shafts and different size exhaust port openings.

What would be the correct diameter of the crank shaft and exhaust port opening for a 31388a motor?

Heck, I may have one and not know it. That would be nice.

Thanks to each of you for your help! :thumbs:

Dave

#7 OFFLINE   MikesRJ

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Posted 06 March 2011 - 12:16 AM

Kohler K90/K91 Crankshaft Dimensions, PTO Extension End

3/4" Diameter straight shaft, 2-3/8" long, 3/16" Key-way, with or without a 3/8-24 UNF-2B tapped hole in the end of the shaft.

Posted Image

RE: http://www.mywheelho...ence-Manual.pdf

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Ability is what you're capable of doing; Motivation determines what you do; Attitude determines how well you do it; and the measure of who we are is what we do with what we have.
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- 3533-A Cab, 7-2211 Cart, ST-324 Snow Thrower, 7-2513 36" Sweeper, RMR-32 Deck, CBR-32 Blade, AC-6 Cultivator, LR-24 Roller, 77-10DC01 Cart, 66-42BC01 Blade


#8 OFFLINE   VinsRJ

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Posted 06 March 2011 - 08:41 AM

The exhaust port for a 400 Suburban K91 would be tapped 3/4-14 NPT without mounting studs. The majority of K91s you will find (non- :thumbs:) will have untapped ports and two exhaust studs.

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#9 OFFLINE   eibbed

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Posted 06 March 2011 - 10:34 AM

Wow! Thanks Mike and Vince. You guys are good!

:thumbs: I just checked my motors and the dimensions lead me to believe that one of them is the correct motor. :thumbs:

I appreciate you all very much.

Dave




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