brookmere
New member
1972 Perkins gas engine, rebuilt 250 hours ago. (16 years ago!). Was running ok but started to backfire through exhaust when accelerating. I cleaned the advance mechanism in the distributor, replaced points, condenser, rotor, cap, wires, plugs, set valves, rebuilt carb with Massey kit (set float etc.), replaced solenoid fuel shut off with new, cleaned fuel delivery system, new gas etc., and a new ignition switch. Compression is 135-140-135. I static timed it then advanced it slightly to help at higher rpm's. (per MF manual)
After all that it seems to run ok and accelerate smoothly for 5 minutes or so, then starts to miss and will backfire if I try to accelerate. Like really backfire, hurts the ears and alarms the neighbours and wildlife for miles! Sometimes when it starts to miss I turn it off and start it again and it will be ok for another 5 minutes.
I have run out of ideas and I would really welcome input from anyone with suggestions. Thanks!
After all that it seems to run ok and accelerate smoothly for 5 minutes or so, then starts to miss and will backfire if I try to accelerate. Like really backfire, hurts the ears and alarms the neighbours and wildlife for miles! Sometimes when it starts to miss I turn it off and start it again and it will be ok for another 5 minutes.
I have run out of ideas and I would really welcome input from anyone with suggestions. Thanks!