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Ask Donald Your Own Question
Donald
Donald, Small Engine Technician
Category: Small Engine
Satisfied Customers: 2026
Experience:  I have 25+ years of experience repairing 2 & 4 cycle engines
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My lawn tractor engine won't crank past compression.

Customer Question

my lawn tractor engine won't crank past compression. installed new selenoid, no change.
JA: Can you guesstimate how old the engine is? And has it done anything like this in the past?
Customer: approx. 8yrs , no never before
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: like what, for instance
Submitted: 7 months ago.
Category: Small Engine
Expert:  Donald replied 7 months ago.

Hello. Thank you for choosing Just Answer. My name is***** will be happy to assist you.

Expert:  Donald replied 7 months ago.

Many times this problem is caused by either your valves being out of adjustment, or the compression release mechanism on your cam gear has failed. The most likely of the two possibilities is your valves being out of adjustment.

Expert:  Donald replied 7 months ago.

Remove your spark plug, then turn your key to start position. Let's ee if your engine spins freely. Make sure your spark plug wire is away from your spark plug hole, in case there is excess gas in your cylinder. You and I can continue from here.