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honda em400 generator question

N

n8terry

Member
I bought this em400 for $40 at a garage sale 3 years ago. I use it to charge my tractor 12v batteries.

I must have screwed up something cause it no longer charges.

I have looked it over to see if there is a reset button or fuse, didn't see anything that was evident.

Can someone help me out? I found where I could buy a manual for $65. Times are tough, don't want to do that.
 
these small generators typically do not use a permanent magnet for its excitation and thusly after sitting idle for a period of time the residual magnetism will slowly dissipate. this occurred to mine and the factory rep. recommended this procedure. start the engine and advance the throttle to full, then reach down to the governor mechanism located on the side of the engine near the carburator and manually increase the engine rpm to wide open for a short period of time. i did mine in 15 sec. bursts to advoid possible engine damage. this increased engine rpm should return the residual magnetism to the generator field. if this works then some good advice, which i follow, is to start the generator occassonially and place load on it for a while.
 
n8terry, go to the archive section and type in key word OPLIN and then follow the directions to log on. i was able to pull up the complete manual for your em4000. once you found it you can then print it out.
 
I've owned one of these little EM-400 Honda generators for about 25 years. It allows user choice of 12DC or 115AC at 63 cps (slightly faster than 60 cps). It came with one installed fuse and one replacement fuse. If you opened the fuse by developing too much load, you must replace the fuse before it can produce electric output again.

I've only run synthetic oil in it since it was new. I'm sure I've run it over 1000 hours and it still performs like new.
 
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