Generator no power to start

[burton298]

Just a tip in case it happens to you. So I have an Onan generator and went to start it a couple days ago. Crank but didn't start on first try, hit the start again and nothing. Tried on the control panel, on the dash and the generator itself, still nothing. Tracked the problem down to the buss 125 amp 32v Mega Fuse in the battery compartment. Swapped it out for a new one and problem solved.

[burton298]

enblethen wrote:
The in rush for a starter could be far more then run amperage.
The fuse for a motor whould be rated somehwere around 300 percent.
Yes, on most circuits it is a good idea to fuse them according to load, but not always wire size. (Wire sizes can be increased to account for voltage drop.
You may want to carry some spares!

You read my mind, have a couple spares in the tool kit already. 🙂

[enblethen]

The in rush for a starter could be far more then run amperage.
The fuse for a motor whould be rated somehwere around 300 percent.
Yes, on most circuits it is a good idea to fuse them according to load, but not always wire size. (Wire sizes can be increased to account for voltage drop.
You may want to carry some spares!

[burton298]

DrewE wrote:

enblethen wrote:
There should be no fuse in the cable going to the genset.

It sure seems to me there should be a (large) fuse in the line near the battery to it to protect against fire in case that wire should short out to the chassis. The only possible exception I could see would be if the battery and generator were immediately adjacent and the wire were very short.

The starter lead for the generator on my motorhome is protected by the battery main fuse, and it was wired that way from the factory.

Yes you are exactly right, the fuse is close to the battery and came that way from the factory.

[DrewE]

enblethen wrote:
There should be no fuse in the cable going to the genset.

It sure seems to me there should be a (large) fuse in the line near the battery to it to protect against fire in case that wire should short out to the chassis. The only possible exception I could see would be if the battery and generator were immediately adjacent and the wire were very short.

The starter lead for the generator on my motorhome is protected by the battery main fuse, and it was wired that way from the factory.

[enblethen]

There should be no fuse in the cable going to the genset.