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Author Topic: Stihl ms460 compression  (Read 3615 times)

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Offline 732hess

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Stihl ms460 compression
« on: February 14, 2010, 01:28:12 PM »
Just purchased used saw, and have run a couple of tanks of fresh fuel mix. Saw seems to start, run and cut well. I checked compression, 5 pulls, showed 165# with snap on gauge with hose, then drops to 155 # and will hold that pressure, is this in the normal range ?. Saw probably has quite a few hours running time would be my guess.

Offline chevytaHOE5674

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Re: Stihl ms460 compression
« Reply #1 on: February 14, 2010, 06:41:44 PM »
150 is a good number. One of mine 460's didn't have much more than that from the factory.

Offline tlandrum

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Re: Stihl ms460 compression
« Reply #2 on: February 14, 2010, 07:13:39 PM »
i have them from 150 to 195 depends on saw and how old and whats been done to them.
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Offline 732hess

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Re: Stihl ms460 compression
« Reply #3 on: February 14, 2010, 07:25:08 PM »
I checked it cold, is that correct ? or should saw be warm ?  Does it matter how many times the starter rope is pulled ?

Offline Cut4fun

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Re: Stihl ms460 compression
« Reply #4 on: February 14, 2010, 07:31:34 PM »
I checked it cold, is that correct ? or should saw be warm ?  Does it matter how many times the starter rope is pulled ?

I keep at it till the needle on the gauge quits moving, depends.

Offline Al_Smith

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Re: Stihl ms460 compression
« Reply #5 on: February 14, 2010, 08:24:43 PM »
You have to remember that a gauge reading is static pressure .Because of the way two cycle piston rings seal under pressure the dynamic or under running conditions will be higher .


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