I hope someone out there can help me with this one, it's got me baffled!
I have recently taken the engine out of my boat (Volvo 5.7 GS) to
replace the damaged ring gear, the engine went back in with no problems
however, it has developed a backfire that occurs only between 2700 and
3200RPM. At all other revs there is no problem and it runs better than
ever at WOT. The engine does not have electronic ignition and has a
twin choke holley carb which I have stripped and found to be spotlessly
clean.
Can anyone shed any light on the possible problem please?
Chris
