Yea that's the yellow you see in the pics, removed them yesterday and they were so brittle they broke to pieces. That's what I was talking about the grease fitting weren't there. They are already threaded but I'm sure they are metric and look fine thread. Also they look to be about equal to 3/8" - 1/2" dia.
If youre friends book spells them out let me know and I'll try to find them locally but I probably will have to order them
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Tis better to be quiet and thought a fool than open your mouth and prove it!!
1991 V-20 cuddy I/O 350 volvo duo prop, 1998 15ft Grumman 9.9 Johnson 
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