"I operate a 4-71 (generat
"I operate a 4-71 (generator service - normally aspirated, Woodward governor) which suffers from low engine power. When you load it up, it looses RPMs but never smokes at all. I bought it recently with 5,000+ hours. Runs very well but with low power - of all the Detroits I have, this is the only one that never smokes even a little. Normally, I would expect clouds of black smoke when it lugs down.
I'm pretty sure it is a fuel problem since it runs so clean. I have fixed:
* Replaced all suction and return lines to tank plus fuel filters.
* Checked fuel pressure and flow both in and out of head - normal (60 psi and 1 gpm overflow, no air in fuel).
* Replaced injectors and made all tune-up adjustments on governor, valves, and injectors.
Is there anything I have missed? Is there something other than fuel problems that could cut the engine power but not produce smoke?
Thanks,
Joel."
"I operate a 4-71 (generator service - normally aspirated, Woodward governor) which suffers from low engine power. When you load it up, it looses RPMs but never smokes at all. I bought it recently with 5,000+ hours. Runs very well but with low power - of all the Detroits I have, this is the only one that never smokes even a little. Normally, I would expect clouds of black smoke when it lugs down.
I'm pretty sure it is a fuel problem since it runs so clean. I have fixed:
* Replaced all suction and return lines to tank plus fuel filters.
* Checked fuel pressure and flow both in and out of head - normal (60 psi and 1 gpm overflow, no air in fuel).
* Replaced injectors and made all tune-up adjustments on governor, valves, and injectors.
Is there anything I have missed? Is there something other than fuel problems that could cut the engine power but not produce smoke?
Thanks,
Joel."