JESSEDIVER49
Senior Member
- Joined
- May 2, 2013
- Messages
- 187
- Location
- USA
- Vessel Name
- Good Vibrations
- Vessel Make
- Grand Banks Classic 42
I am close to buying a 1984 42ft Grand Banks with two 120 HP Ford Lehmans. During sea trial I noticed how "rough" the engines ran while in gear below 1000 rpm. So rough at 800 rpm that the drawers in dinette vibrated open. At 1000 rpm and above, engines run smooth and run cool. One person said, all Ford Lehmans are like that; the surveyor (not mechanic) said the rough idle is "highly abnormal"; another said may be need for valve adjustments and/or injector servicing. Don't have mechanic report yet but leaving survey, mechanic said his findings were minor. I remain very concerned about the rough idle. Could be a show stopper for me. Comments would be greatly appreciated!