borjawil
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- Joined
- Sep 26, 2025
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Poulan Pro pp19a42 model with 19hp intek engine.
Battery and starter are good.
Engine will turn 1/8 turn approx and starter can't get it past that. So I turn by hand a bit, and starter will start the tractor up just fine.
I have set the valves - top valve exhaust at .004-.005, bottom valve intake at .006.
In my searching some say to turn the engine by hand until piston is at TDC and both rockers are loose. Some say to turn it just past TDC until your screwdriver, or whatever you're using inside the cylinder, goes back in 1/4". I've tried both. Only thing that seems to be consistent is EX valve .004-.006, and IN at .005-.007.
Is there something else that could be causing this issue? Seems a common issue due to valve lash, or decompression cam?
Battery and starter are good.
Engine will turn 1/8 turn approx and starter can't get it past that. So I turn by hand a bit, and starter will start the tractor up just fine.
I have set the valves - top valve exhaust at .004-.005, bottom valve intake at .006.
In my searching some say to turn the engine by hand until piston is at TDC and both rockers are loose. Some say to turn it just past TDC until your screwdriver, or whatever you're using inside the cylinder, goes back in 1/4". I've tried both. Only thing that seems to be consistent is EX valve .004-.006, and IN at .005-.007.
Is there something else that could be causing this issue? Seems a common issue due to valve lash, or decompression cam?