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Onan Generators

Onan 7.5DKDFL - A good fit for me?


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  #61  
Old 01-15-2018, 01:44:37 AM
DieselBound DieselBound is offline
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Location: Arlginton, Washington (wireless)
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Default Re: Onan 7.5DKDFL - A good fit for me?

SUCCESS!

I installed the new Hubbell plug and I STILL didn't have requisite voltage, I measured 107v at a receptacle. Accessing at the generator's breaker looked to be too messy so I went ahead and measured at the plug end (disconnected from run). The voltages seemed to be moving around quite a bit. Decided to just plug it in and get it loaded down and see what would happen.

Initially I was seeing about 111v. Acceptable. And then after a bit with various household stuff running I was seeing 115v up to 119v. Seemed to settle down and ran mostly at 118v.

Hz was measured at 61.47. I only made one measurement and I can't recall at what point in this run cycle I'd made it.

No problems with my UPSes.

Anyway, I'm thinking that this was all a matter of a generator needing to be exercised with a good load. I had not done this in quite some time: I'd embarrass myself by saying how long I think it had been. The Leviton plug really needed to go, and I suppose this was all a good reason to have done that: the Hubbell makes for a very clean install/connection.

I'm losing prime (since replacing the fuel lines from/to the tank) and I suspect that it's the fuel line quick connects (marine) to the fuel tank.
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  #62  
Old 02-14-2018, 01:53:55 PM
DieselBound DieselBound is offline
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Default Re: Onan 7.5DKDFL - A good fit for me?

Still fighting the darn fueling issues! Now, however, I'm thinking that I'm getting a blockage at the fuel pick-up as the in-line primer bulb (new) is collapsing (before, when I was sure I was having air issues, it wasn't collapsing). Given the little fuel that this engine consumes it will run for some time before this becomes an issue (a good 10 minutes). BUT...

When working on the fueling issues (discovering that it's still not licked), I discovered that I'm once, again, having voltage output problems. I was getting about 83V at various outlets. Tried applying more loads thinking that it might "shake" things up, but no change. I checked voltages at the plug from the generator (disconnected) and I'm getting 114V. Where should I start trying to troubleshoot?

I've checked (loosened and then re-tightened) the wires at the receptacle. There's a J-box in the run (on the other side of the wall) and I'm going to be checking there: can't recall if there's a splice or whether it's just a pull box- this was all done by an electrician.

Is it even possible for a wiring run to have an issue that would result in a power drop like this? Running four wires: (2) 120V, (1) common and (1) ground.

The generator isn't really responding to a load. That is, it doesn't sound like it's ramping up in power. The fueling issue is possibly causing me problems here, though I cant' see how it can be doing so during the initial run-time as the primer bulb and line will be delivering ample amount of fuel (I'm thinking- though if there's excessive vacuum from any blockage [never an issue before] maybe?).
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