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dsoly

416 Onan

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dsoly

Hi all, I have a 416-8 with an Onan. This tractor is driving me nuts. Starts and runs excellent, but randomly stalls. No surging no loss of lights or charging , nothing. But it starts right back up every time. I've changed fuel pump,filter, fuel line, new fuse block and did the battery wire mod on the 9 pin connector. It's totally got me stumped. I've also bypassed seat switch. 

 

 

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daveoman1966

What you describe is how a bad condenser would act. When cold, the condenser is ok, but when it gets up to engine temp, it begins to fail....resulting in no engine spark.

Now, I don't know if the Onan engines have the condenser like a Kohler has, but it is just a thought.

Dave

 

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cleat

For some reason the Onan uses the condenser on the positive side.

 

Unsure how this could work, but I guess Onan engineers deemed it so.

 

My 416 would sometimes backfire when I turned the key on with a hot engine before actually cranking it. I replaced the condenser and that stopped so I guess that is what it is for.

 

I would go through all the wiring, seat switch, PTO switches, ignition switch, 9 pin connector etc and make sure everything is tight and the connectors look good and clean.

 

I wonder if a bad ignition switch would do this and when you touch it to restart, it regains connection for a while.

 

If it were running out of fuel, the filter would be empty. That is how I found one of my 520's had a bad pump.

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dsoly

Thanks guys! Gonna tear into it next 

couple of days and see what I can find. 

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boomers_influence

dsoly

you do not state which onan engine you have??

P series condenser hooked to the + side of the coil. electronic ign. ( it IS NOT needed to run )

B series condenser hooked to the _ side of the coil,

but usually inside the point box. it is needed.

boomers_influence@yahoo.com

thank you. boomer ( the used onan engine parts guy, also NOS and new )

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dsoly

It's a p216. I changed key switch, now it starts as soon as I'm in run position. Thanks boomer

I have a 315 classic, raider 14, 416-h, with a transplanted p220, and a 417-8. Boomer , all of these tractors have been great, Onans, and kohlers. But this one is giving me fits. Thinking its needing the engine pulled off and everything gone through 

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kayvonmansouri

Just for anyone else that might come across this,  Mine was doing something similar, and i trouble shot it to the seat safety switch.  

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