Johnson "SERVICE VALVE"????

I

Incorrigible

Petty Officer 2nd Class
Joined
Jan 5, 2009
Messages
111
Can anyone provide an explanation of the purpose to the Johnson "SERVICE VALVE"? My engines are 1990 Johnon 225's. There is a red knob/lever going into the electric primer area. The OMC part number is 175158 and Sierra part number 18-0871. Neither of my manuals cover repairs, replacement, or even the PURPOSE behind it????

Any help, greatly appreciated, as always...
 
D

Daviet

Fleet Admiral
Joined
Sep 24, 2008
Messages
8,958
Re: Johnson "SERVICE VALVE"????

I think you might be talking about the schrader valve used to inject decarb or pickling oil into your engine.
There is really no service to do to it.
It is a direct port into the engine bypassing the carbs.
Hope I explained it well enough.
 
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