Merc 1.7 not going over 2500 revs in fwd..
I know this was asked before but the OP didnt post what the eventual solution was.
This week at cowes merrily going along then the revs dropped to 2500 in fwd and wont budge above that. Fine in neutral and reverse. Changed fuel fileter but no difference. Merc agen suggeted hole in piston to reoved the oil filler cap to feel for buffering but nothing. Got towed home by seastart and they had a look.. There is some bkack smoke but not much and engine sounds fine.... soooooo does it sound like this well known turbo issue???