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Old 03-09-2014, 07:54 PM   #1
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City: Friday Harbor
Country: usa
Join Date: Aug 2013
Posts: 35
perkins 4-108 injector pump replacement

I will be replacing my injector pump later this week and I wonder if anybody knows the size of the allen wrench needed to get at the inside bolt which is an allen nut.
Any other thoughts regarding this project would be appreciated
p.s our engine is a westerbeke 40 but I understand it is the same as the perkins

bcarli is offline   Reply With Quote
Old 03-10-2014, 07:45 PM   #2
City: Houston
Country: US
Join Date: Feb 2014
Posts: 15
I did that on my 4108 in December. And of course I just drew an immediate blank on the exact size.. But I'll get it for you.

My tools for a successful change out.

Update: It's a 5/16 Allen head. Lowes and HD carry them. Unless you want to remove other engine parts, get a long extension and the long hex socket set.
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Piratesailor is offline   Reply With Quote

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