RV.Net Open Roads Forum: Tech Issues: Kohler 5CKM21 no compression in both cylinders

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Tech Issues

Open Roads Forum  >  Tech Issues

 > Kohler 5CKM21 no compression in both cylinders

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 5  
Next
Sponsored By:
Gjac

Milford, CT

Senior Member

Joined: 08/16/2006

View Profile



Good Sam RV Club Member

Offline
Posted: 09/08/21 12:25pm Link  |  Quote  |  Print  |  Notify Moderator

Finally got to go camping last week, started the genset to heat lunch, it started right up, ran for no more than 10 mins then died. Would not start again. Checked fuel pump plenty of fuel squirted out, checked spark had spark but plug was dry. I noticed a broken wire to the fuel cut off solenoid at the bottom of carb bowl and reattached it thinking that was why the plug was dry but still no start and dry plug. Sprayed starting fluid into cylinder but not even a pop. When I returned home I checked both cylinders and neither had compression. What would cause both cylinders to have no compression? Of course my worst fear is a broken cam shaft or something serious, but I did not hear any noises when the genset died.

bgum

South Louisiana

Senior Member

Joined: 02/22/2006

View Profile


Offline
Posted: 09/08/21 12:35pm Link  |  Quote  |  Print  |  Notify Moderator

Valve stuck or worse.

bgum

South Louisiana

Senior Member

Joined: 02/22/2006

View Profile


Offline
Posted: 09/08/21 12:36pm Link  |  Quote  |  Print  |  Notify Moderator

Duplicate

Gjac

Milford, CT

Senior Member

Joined: 08/16/2006

View Profile



Good Sam RV Club Member

Offline
Posted: 09/08/21 12:52pm Link  |  Quote  |  Print  |  Notify Moderator

bgum wrote:

Valve stuck or worse.
Would a stuck valve cause both cylinders to have no compression?

enblethen

Moses Lake, WA

Senior Member

Joined: 01/05/2005

View Profile






Posted: 09/08/21 01:03pm Link  |  Quote  |  Print  |  Notify Moderator

You made it home!
I cannot find many drawings. Thing I did find is that you may have a "rubber" timing belt.
Timing belt
Would you check for any other model numbers on spec plate? Keep running into roadblocks on your number.

* This post was edited 09/08/21 01:11pm by enblethen *


Bud
USAF Retired
Pace Arrow

2003 Chev Ice Road Tracker


bgum

South Louisiana

Senior Member

Joined: 02/22/2006

View Profile


Offline
Posted: 09/08/21 02:07pm Link  |  Quote  |  Print  |  Notify Moderator

Did you pull the plugs to see if the pistons are moving up and down as they should? I know you said they were dry but did you check the pistons?

bgum

South Louisiana

Senior Member

Joined: 02/22/2006

View Profile


Offline
Posted: 09/08/21 04:26pm Link  |  Quote  |  Print  |  Notify Moderator

Can't find manual on that model but some had a automatic compression release that were made to work with a spring and/or exhaust gear. Have you tried calling Kohler?

bgum

South Louisiana

Senior Member

Joined: 02/22/2006

View Profile


Offline
Posted: 09/08/21 04:41pm Link  |  Quote  |  Print  |  Notify Moderator

OK final thoughts are you need to check the valve lash and lastly it could be bad head gaskets. Anything else and it's going to get expensive.

Gjac

Milford, CT

Senior Member

Joined: 08/16/2006

View Profile



Good Sam RV Club Member

Offline
Posted: 09/08/21 07:03pm Link  |  Quote  |  Print  |  Notify Moderator

bgum wrote:

Can't find manual on that model but some had a automatic compression release that were made to work with a spring and/or exhaust gear. Have you tried calling Kohler?
Yes, I called Kohler, after 6 transfers I finally got a guy that seemed like he would help. Unfortunately he was not familiar with the engine. He said he would do some research and get back to me. He did not know why both cylinders would have no compression. Asked if it could be a broken timing belt he said he did not believe it had one. I found some web sites that talked about an ACR system but if I understand it correctly, if the spring fails the release faults to maximum compression rather than reducing the compression until it starts. You really can't see down the cylinders with plugs out, Bud suggested putting a plastic straw in the cylinders and see if it goes up and down when the engine is cranked. I will try that tomorrow and also will also try squirting some oil in a cylinder to see if the pressure goes up.

enblethen

Moses Lake, WA

Senior Member

Joined: 01/05/2005

View Profile






Posted: 09/08/21 07:11pm Link  |  Quote  |  Print  |  Notify Moderator

Gary:
I found which engine it is.
Found it to be a "KT-17" used on many riding lawn mowers. Some look like vertcal shaft, but yours is horizontal, Correct?

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 5  
Next

Open Roads Forum  >  Tech Issues

 > Kohler 5CKM21 no compression in both cylinders
Search:   Advanced Search

Search only in Tech Issues


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:




© 2021 CWI, Inc. © 2021 Good Sam Enterprises, LLC. All Rights Reserved.