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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 13581
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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I have a 18.5 horse motor, when I try and start it acts like

Customer Question

I have a 18.5 horse motor, when I try and start it acts like it goes into compression lock
when I removw thw spark plug it will turn over fine
Submitted: 2 years ago.
Category: Small Engine
Expert:  JohnF2015 replied 2 years ago.

Hi, my name is***** will be assisting you.

Do you notice anything coming out of the exhaust when you try to start it? What does the oil level look like on the engine?

Customer: replied 2 years ago.
nothing coming out of exhaust, oil level fine
Expert:  JohnF2015 replied 2 years ago.

I would check the valve clearances, this engine has a compression release built into the camshaft. If the valve clearances become to far out of adjustment it will cause the engine to be extremely hard to crank over. You want both valves to be set at .004 inches when the engine is cold.