125 K301 head

IHC Cub Cadet Forum -- Questions and answers to all of your Cadet related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
User avatar
cef2lion
5+ Years
5+ Years
Posts: 81
Joined: Thu Apr 15, 2010 6:27 am
Zip Code: 16668
Location: Central PA

125 K301 head

Postby cef2lion » Fri Nov 05, 2010 9:48 am

The 125 I just got has stripped threads on the spark plug. Past owner had a helicoil done. Its ok but I'm not sure the plug is in far enough. I sourced a replacement head. Then I found out about high and low boss heads. And that Kohler made a few different head designs. My exising head appears to be a low boss with the spark plug centered between the valves. The replacement head I have appears to be the newer design with the plug over the exhaust valve. I found a description of this head.

The newest style head manufactured by Kohler is much like the previous one, but has the spark plug located directly over the exhaust valve. There are two reasons why Kohler did this:

It prevents cold-starting incoming raw fuel from fouling the spark plug.
It helps to produce more engine power and torque by retaining the majority of the combustion heat in one area.

If I use this replacement head the tins on top the K301 will not match up with the spark plug hole. Has anyone else done a head replacement like this. I can cut the tin a bit to make the plug hole match the tin.

User avatar
Jeff in Pa
5+ Years
5+ Years
Posts: 82
Joined: Sun Jul 11, 2010 10:31 am
Zip Code: 18092
eBay ID: jrd77vet
Tractors Owned: Cub Cadet 122
Cub Cadet 125
Location: PA, Zionsville

Re: 125 K301 head

Postby Jeff in Pa » Sat Nov 06, 2010 4:18 pm

My 122 had the low boss head on it when I got it. Although they put a few pieces of tin work on it, it looks like just cutting the muffler heat shield would suffice.

Image

Mark In Richmond
10+ Years
10+ Years
Posts: 588
Joined: Mon Sep 17, 2007 9:06 pm
Zip Code: 23069
Location: Central Virginia

Re: 125 K301 head

Postby Mark In Richmond » Sat Dec 11, 2010 9:36 am

I have a 301 head for sale. I send send you a photo if interested. It's in great shape Threads are perfect.


  • Similar Topics
    Replies
    Views
    Last post
  • K301 rebuild
    by Ken (48 Cub) » Mon May 04, 2015 9:13 am » in Cub Cadet
    3
    565
    by Ken (48 Cub)
    Tue Jun 09, 2015 8:23 am
  • K301 to K321
    by sdurnal » Fri May 01, 2015 2:50 pm » in Cub Cadet
    5
    642
    by sdurnal
    Mon Sep 21, 2015 8:18 am
  • Hole in head
    by sdurnal » Tue Jul 28, 2015 9:07 am » in Cub Cadet
    1
    295
    by Eugene
    Tue Jul 28, 2015 11:23 am

Return to “Cub Cadet”

Who is online

Users browsing this forum: No registered users and 2 guests