John Deere JA65 wont start, New Coil done

[thinkglad]

Yes all strokes are herd through the carb, none at the exhaust and little at the plug hole. must be a stuck valve.

Ok any direction on getting into this? Is it worth it?

 

[Lawnranger]

Remove the cylinder head and inspect.

 

[thinkglad]

OK, looks like I can get to it without pulling the motor, I will let you know how it looks and post some pics

 

[exotion]

At this point i would just sell it as is on craigslist and buy a new mower :/

 

[thinkglad]

Yeah.....I wonder if its hust the head ...anyone know of a source for a head?

 

[thinkglad]

No valve movement at all...Camshaft..? Im really not sure how the rotating assembly of one of these small gas engines are arranged? Do the valves operate right off the cam lobes? Is there a timing chain that could have broke?

Thanks

 

[thinkglad]

Now that I open this up it looks like this is not the engine I thought it was...????..... This is not an over head valve motor

This is a 12J802-1753 E1

Regardless the valves still dont move...

 

[EngineMan]

Open the valve cover and see if the exhaust valve is moving. and yes if you can upload a video.

 

[thinkglad]

Link to the video above, as you can see no valve movement.....:frown:

 

[Lawnranger]

Link to the video above, as you can see no valve movement.....:frown:

If you have some mechanical aptitude, which it seems you do, why not disassemble the engine and find out if you have a broken camshaft or stripped cam gears (many times they are plastic) and maybe you can get just a cam and gasket set to save the engine but only you know if it is worth the time. The mower could have a lot of hours on it so if it does, consider a new mower.