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Old 14-05-2014, 15:49   #1
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perkins 4.108 idle speed?

What is the Perkins 4.108 idle speed?
I have rebuilt the engine and replaced the alternator with a 100amp unit and a new Tach setup for the alternator. hat is the proper idle speed. The engine idles very slowly.
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Old 14-05-2014, 16:16   #2
Guy
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Re: perkins 4.108 idle speed?

Ours changes between hot and cold. Hot it gets down to 450 cold 750.
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Old 14-05-2014, 16:16   #3
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Re: perkins 4.108 idle speed?

The book says 625 - 650. If you are trying to set a electric tach . You need to use the mechanical takeoff under the alternator. Best not to mess with the antistall and just adjust the low idle setting.
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Old 14-05-2014, 16:20   #4
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Re: perkins 4.108 idle speed?

Quote:
Originally Posted by Redcoat View Post
. Best not to mess with the antistall and just adjust the low idle setting.
If you have the service manual you can do it.
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