Running an Evinrude with no electrics

[Mohawkmtrs]

Working on a 1974 Evinrude 40 HP model# 40E74S, remote, electric start.

A friend brought it in off the boat. I have it on a stand and my question is: Will it hurt to rope start it and run without any electrics hooked up from the remote and no battery?

I realize that I'll likely have to choke it to stop it.

All advice appreciated.

 

[kfa4303]

Re: Running an Evinrude with no electrics

If you're strong enough to pull start it, you should be fine. just make sure it's pumping plenty of water while running.

 

[airman1094]

Re: Running an Evinrude with no electrics

I've always heard that it is bad to run outboards without a battery hooked up! From what I understand the rectifier can blow a diode from voltage spikes because the gererated power has no where else to go...I always run mine with a battery...even discharged ones just to help bank extra voltage...not 100% on how true it is

 

[kbait]

Re: Running an Evinrude with no electrics

Agree w/airman^. I've heard it's bad for the charging circuit, but have seen many charge just fine after running for years w/o battery hooked up. Just be sure to isolate the battery cable ends so they can't touch together.. that'd likely cook the charging circuit.

Good luck!

 

[kfa4303]

Re: Running an Evinrude with no electrics

+1. aiman1094 may be correct I didn't think about the electronic ignition. It it was a year or two older with a magneto, it would be a non-issue, but I'm not sure about the solid state system.

 

[F_R]

Re: Running an Evinrude with no electrics

While some people may have lucked out, far more have blown rectifiers by running with the battery disconnected, (or cables loose). If you must run without the battery, disconnect the yellow wires from the rectifier.

 

[GA_Boater]

Re: Running an Evinrude with no electrics

With electronic ignition, will it start without a battery?

 

[boobie]

Re: Running an Evinrude with no electrics

On that mtr yes...

 

[F_R]

Re: Running an Evinrude with no electrics

With electronic ignition, will it start without a battery?

It doesn't have electronic ignition. It has the OMC Lo-Tension Magneto. And yes it will run without a battery.

 

[GA_Boater]

Re: Running an Evinrude with no electrics

A mag can run without a battery- someone mentioned EI earlier. Curiosity, is all. Thanks.

 

[Mohawkmtrs]

Re: Running an Evinrude with no electrics

Thanks guys...I'll disconnect the yellow wires from the rectifier before ropeing it.

I'll likely have an arm like a leg by the time I'm done. It hasn't run in couple of years.

I have the gear case off now and will be putting in a W/P kit but the last guy in it installed 2 mild steel screws in the pump housing and you guessed it...rusted like crazy!

I have it soaking with penetrating oil for a couple of days now...hopefully, Patience will be my friend.