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Old 07-05-2017, 08:21 PM   #1
ericandrews331@msn.com
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Default Compression on a CWFE350

What would be a healthy compression reading on an FE350?
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Old 07-10-2017, 09:03 AM   #2
ezrenee
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Default Re: Compression on a CWFE350

I was also wondering this info as I have a 2007 Prec with over 700 hours and governor off all 9 years. I have 140

I found this info from a past post from screen name Deans

Normal compression readings for both the FE-290 and Fe-350 are quoted below... Note the 290 and 350 pedal start engines do not have an automatic compression relief valve (ACR) and should have a higher normal compression when performing the test. If it is a key start engine it could just be a bad ACR and not rings or exhaust valves. Your judgement (and wallet) will have to determine the break-even point on whether or not to re-build; i.e. it doesn't have enough power to pull cart and rider(s).

FE-290 Engine
"GENERAL INFORMATION
Prior to attempting time-consuming repairs to the cylinder assembly, a cylinder compression test should be performed using a standard compression tester. Low compression would normally indicate a problem in the cylinder assembly such as defective rings, gaskets, etc. At a cranking speed of 550-600 rpm, the compression should be typically 156 psi. This value could vary slightly depending on wear of components affecting compression."

FE-350 Engine
"GENERAL INFORMATION
Prior to attempting time-consuming repairs to the cylinder assembly, a cylinder compression test should be performed using a standard compression tester. Low compression would normally indicate a problem in the
cylinder assembly such as defective rings, gaskets, etc.
• Key-Start Engines: These FE350 model engines are equipped with an automatic compression release valve (ACR). This valve releases compression pressure at normal cranking RPM, resulting in lower compression. At a normal cranking speed of 550 - 600 RPM, the compression should be typically
71 psi. This value could vary slightly depending on wear of components affecting compression. See Automatic Compression Release Valve (ACR) Inspection on page 3-22.
• Pedal-Start Engines: These FE350 model engines are not equipped with automatic compression release valves (ACR). At a normal cranking speed of 550 - 600 RPM, the compression should be typically 156 psi. This value could vary slightly depending on wear of components affecting compression."
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Old 07-11-2017, 05:30 AM   #3
ericandrews331@msn.com
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Default Re: Compression on a CWFE350

thanks
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