Think I diagnosed wrong!

[dart451]

I always suspect valve lash before replacing a starter...Something I learnt from Walt 15 years ago...
( I got to use "learnt" !!!)

Well, I will from now on (I hope!) The brain doesn't seem to remember as well as it once did! I picked up the tractor and brought it back to my shop...took the valve cover off and I do know just by looking at it that the exhaust valve is WAY TOO LOOSE! I'm gonna let it cool down so I can check the valves correctly. I also read my manual and know I have to go beyond TDC to bypass the ACR...

[NO0C]

Forget the TDC BS and set the valves the easy way:

viewtopic.php?f=3&t=3439

Well, I will from now on (I hope!) The brain doesn't seem to remember as well as it once did! I picked up the tractor and brought it back to my shop...took the valve cover off and I do know just by looking at it that the exhaust valve is WAY TOO LOOSE! I'm gonna let it cool down so I can check the valves correctly. I also read my manual and know I have to go beyond TDC to bypass the ACR...

[dart451]

Valves were way out of adjustment! Both about .020. Tractor starts fine now. Thanks to all that steered me in the right direction!

[38racing]

What's the reason that flat head valves tend to loose clearance and ohv get looser

[bgsengine]

What's the reason that flat head valves tend to loose clearance and ohv get looser

flat head engines - only one direction for them to wear, really.. on the valve faces.. OHV engines, rocker arms and pivots will wear out faster than the hardened valve faces will.

[KE4AVB]

Also for some engines camshaft lobes wear more on the OHVs too. I just replaced a 793380 where the exhaust valve lobe was worn nearly round yet the exhaust valve was moving freely. I have several used OHV cams to have wear on the lobes when replacing them due ACR failures.