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Reload this Page Kohler Magnum 18 Compression
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  #1  
Old 07-08-2023, 12:24 PM
Redneck #1 Redneck #1 is offline
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Default Kohler Magnum 18 Compression
Does the Kohler Magnum 18 have a compression release? I have been having an issue with starting the engine after it is warm. If I run the tractor for a while, turn it off, then try to restart it seems to have too much compression to turn over. The battery is relatively new. Any suggestions? Thanks
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Old 07-08-2023, 12:42 PM
R Bedell R Bedell is offline
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Quote:
Does the Kohler Magnum 18 have a compression release?
NO.

Quote:
it seems to have too much compression to turn over
What is the compression readings on both cylinders ??
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Old 07-08-2023, 12:52 PM
Redneck #1 Redneck #1 is offline
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I will check the next time I run it. Will get numbers for both before it's warm and after.

Is it correct that only the older engines with starter/generators have a
compression release?
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Old 07-08-2023, 01:56 PM
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ol'George ol'George is offline
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Yes, the bigger kohler singles have compression releases.
The KT/ Magnum engines have no compression releases.
I'd be checking that the battery cables ( both positive and negative) making sure they are clean and tight,
also don't forget the terminals on the solenoid as they tend to rust.
How old is the battery? does it pass a load test?
Also sometimes the starting motor brushes wear out.
I'd not worry about compression unless you smell gas and it belches black smoke on warm starting, as that might be hydro locking due to excessive fuel because of fuel boil in the carb, or a leaking needle/seat flooding the cylinders.
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Old 07-09-2023, 07:49 PM
Steve N Mi Steve N Mi is offline
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Originally Posted by ol'George View Post
I'd not worry about compression unless you smell gas and it belches black smoke on warm starting, as that might be hydro locking due to excessive fuel because of fuel boil in the carb, or a leaking needle/seat flooding the cylinders.
Even if you don't smell gas, pull the plugs and roll it over with the starter - watch for gas to exit the cylinder (s). Liquid isn't compressible and will load the starter quickly.
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Old 07-10-2023, 06:13 PM
Eslenk Eslenk is offline
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Even if you don't smell gas, pull the plugs and roll it over with the starter - watch for gas to exit the cylinder (s). Liquid isn't compressible and will load the starter quickly.
Put a rag over the spark plug holes because if there is gas in the cylinders you wont believe how far that gas will shoot.

Been there, done that.
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Old 09-29-2023, 06:25 PM
Redneck #1 Redneck #1 is offline
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I cleaned all the battery connections as suggested. The battery terminals, ground connection, and solenoid connections. Seems to have solved the problem. Thanks for the advice.
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