Rebuilding a 27hp Kohler engine ch740 - HobbyTalk
LinkBack Thread Tools Search this Thread
post #1 of 3 (permalink) Old 11-05-2011, 09:40 PM Thread Starter
Join Date: Nov 2011
Location: St. Pete, Fl
Posts: 9
Rebuilding a 27hp Kohler engine ch740

Hello all I am new to this forum. The pressed on Cam gear on the crank shaft has cracked and now free spins on the crank. I am woundering what could cause this? I have torn down the engine and both of the intake rods for the lifters are warped slightly. I cleaned the valves with a wire wheel and also laped the surface.. everything lookes good. I am thinking of putting on a new set of rings while I have it all torn apart. I am planing on using standard rings and am woundering what type of honeing I should do?? Probably a high grit honeing? Just to deglaze the cylinder? I am a little nervouse with this being my first time and would apreciate any input you fine folks could give me

Thanks in advance
Lawns4Life is offline  
Sponsored Links
post #2 of 3 (permalink) Old 11-06-2011, 09:00 AM
Top Dog
30yearTech's Avatar
Join Date: Sep 2006
Location: Central Texas
Posts: 6,109
You can download the Kohler service manual for your engine at the Kohler website. It will give you a lot of info and specs for the engine. My guess on the bad timing gear is perhaps it was damaged in the original installation as there is no real reason for the gear to fail in normal use with proper engine maintenance. for the manual, just enter as a guest.
30yearTech is offline  
post #3 of 3 (permalink) Old 11-07-2011, 06:59 AM Thread Starter
Join Date: Nov 2011
Location: St. Pete, Fl
Posts: 9
Thanks for the reply, Yes I do have the manual. My question is more along the lines of since I already have to replace the crank, should I also put a new set of rings on? The cylinders look great with no scoring or pitting. I can still see the cross hatch pattern on the cylinder walls. The motor has close to 2000 hrs. on it. Also what type of honing should I do?
Lawns4Life is offline  


Quick Reply

Register Now

In order to be able to post messages on the HobbyTalk forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome