I am experiancing some troubles with my 23 year old Yanmar 2 cyl. diesel. During operation, the rpm''s occasionally fluctuate and drop then it resumes its correct rpm again. It does this for about 15 stressful minutes before again returning to its proper rpm. I think that maybe the
fuel pickup is clogged or something. It seems to be definatly
fuel related. I have clean filters (racor) on the
fuel system. Is there a way to clean the tank and
fuel?