Update on MEP005A generator. Injection pump working now, unstuck after years of non-use. Thanks to PB Blaster. Installed new seals on injection pump fuel line connections-no leaks anymore-unit starts and produces 120/208 3 phase. Alternator produces 27 volts DC or so to batteries--Voltage rheostat works to adjust voltage independent of rpm--HZ rheostat does not alter HZ--at start HZ is at 53--increase rpm and gauge can be adjusted to 60HZ. (Please read the Operator TM. The Hertz rheostat has no function on the MEP-005A. This set is a Utility Generator set. No electric governor and that means you can not adjust the hertz from the panel.) When engine starts- it runs up to the pre-set speed on the throttle at injection pump. Manual throttle is pushed all the way in. (This is wrong. Start the set, use the Manual Throttle control to adjust the set to the correct 60 hertz, or better, 61 hertz, and LEAVE the control knob where its at. DO NOT "throttle down the set, when turning it off. Simply turn it off.) Sounds to me like the engine is pre-set at 1800 rpm, but unknown. I will get a no contact digital tachometer to verify what the engine rpm is. The only way I can get 60HZ on the gauge is by increasing engine rpm. (see above) The HZ rheostat does nothing when you turn it up or down. Any ideas on what is going on with the HZ? Does the rheostat for HZ supposed to be able to be varied independent of rpm like the voltage? Funny bringing up the rpm causes the gauge to move from 53HZ to 60HZ with the manual throttle pulled out about 3/4 inch. Increasing the rpm does not cause an increase in voltage. (Why should it increase voltage? Separate function) Only the HZ increases with higher rpm. The machine should have had a tachometer. (Why? The hertz meter is the tachometer. RPM=HERTZ) They designed all this other crap into it and failed to provide a most needed gauge. Snow has arrived at Hawley, MN so unit will rest in pole barn until spring now. I will periodically fire it up and let it run for an hour or so to keep the bugger freed up. Also--not sure if thermostat is opening as I do not see antifreeze movement when I remove the radiator cap. Temp gauge after an hour of running does not move. (Go to the left front door. Open it, and reach in to use the manual shutter control, to exersize the shutters. Then leave it alone. The shutter rarly open, unless you put the gen set under load. Simple running it with no load is not good for this gen set. It will wet stack. If you put it under at least a 60-70% load, the set works harder, the temprature should come up and the shutters should open. That is the only way to test the shutter control. I would replace the thermostat on any old generator, anyways.) Thanks for the information regarding the self-exciting of the generator by holding the start switch on after the engine has started and continue to hold until you see voltage on the gauge. Then release start switch and remain in run position. Have a good weekend and any advice regarding the HZ would be helpful.
