Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

Honzoo Mower


thiggy's Avatar
Member

Join Date: May 2002
Posts: 718
AL

04-24-07, 06:43 PM   #1  
Honzoo Mower

We have at our farm a very old Yazoo mower which has a replacement Honda engine which is itself probably about 20 years old. It quit running recently while my brother was mowing. I tried to start it but couldn’t. I verified it was getting fuel and spark and had a very vigorous compression, so I suspected the timing or valve train. Since it was an OHV, it was easy to pull the valve cover. Upon doing that I discovered that it had a bent exhaust push rod, and I am unable to press the exhaust valve open with my thumb, while I can manually open the intake. I assume something is causing the exhaust valve to stick, but I am not familiar with OHV small single-cylinder engines. My only experience in the past has been rebuilding older flat-heads. I would like to remove the cylinder head. I see 4 bolts which seem to be head bolts, but I do not see any seam where the block and head separates. Are the heads usually removable from the cylinder? I am uncertain of the model number. The following is what I was able to find stamped on the engine case: either QA** or OA** followed by GX140-92363. Can you tell me which of these numbers represent the model ID? I would like to find a service manual or at least an exploded view of this engine. Does anyone have any suggestions? Thanks

 
Sponsored Links
Azis's Avatar
Visiting Guest

Posts: n/a

04-24-07, 07:05 PM   #2  
Azis
GX140 will be the key. Keep all numbers handy however.
Honda has some manuals available here
http://www.hondapowerequipment.com/own.htm
other info as well.

 
cheese's Avatar
Forum Topic Moderator

Join Date: Jul 2001
Posts: 16,567
GA

04-24-07, 08:29 PM   #3  
Yes, the head is removeable. It sounds like the exhaust valve is stuck. Those are excellent engines, and I have never seen a valve stick on one while it was running. Not sure what to tell you to expect.


"Who is John Galt?" - Ayn Rand (Atlas Shrugged)

God bless!

 
Search this Thread