in2hockey
I have a 13kw Generac that I "inherited" from my Boss. I've talked about here in other threads. The model # is: 0052530 and the serial is: 4904677
My question is what's the typical cranking time for these units when they're cold. This unit doesn't start until the second round of cranking. It almost starts on the first round but then pauses and starts almost immediately on the second round. I checked and adjusted the valves, the exhaust were both tight, almost no clearance. The closest intake was at about .008 and the far intake was within spec at .004 I set the other 3 valves to .004, replaced my plugs and gapped at .040
If this is normal for a cold crank time so be it but I feel like it should start easier.... Any thoughts would be appreciated! Thanks!!
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Peddler
I would gap the plugs a little closer, .030, check to make sure the choke plate is absolutely flush with the intake so you get a decent seal.  If there is any backfiring or pops when it is cranking I would replace the coils. 
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in2hockey
I'll try closing the gap to .030, no backfiring and no pops. It cranks clean and is just shy of starting on the first go round. I'll check the choke plate... Thanks!
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78buckshot
What is the type of fuel and have you checked the pressure?
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grsthegreat
i agree with previous post about watching both stepper motors for operation during start and check choke plate
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in2hockey
Propane and no I haven't checked the fuel pressure. It's only a hard start when cold, like more then 6-8 hours between starts. I can start it an hour or two later and it starts right away. I'll check the fuel pressure but thinking out loud it's sure sounding like the choke plate being it's only a hard start when cold. Thanks all!
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murphy
The fuel between the demand regulator and the engine leaks out over time.  Once it is gone the vacuum created by the engine during cranking has to be strong enough to open the demand regulator.  Only then does fuel start to flow.  The engine can't start until the fuel gets to the engine.  Check the fuel path for leaks.  My old 7 kW from 2006 had a rubber bellows the was prone to degrading and letting air in.  That meant a lower vacuum and a lot longer for the engine to start.  Installing a new bellows solved the problem.  I no longer have that generator.
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78buckshot
I have had good success with adjusting the secondary regulator to 13.0" - 13.5" static pressure, and as long as you have a gage hooked up check the pressure drop from static to running mode, would like to see no more than 1.0" drop.
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in2hockey
Lots of Good Stuff here guys, thanks! With DST in effect I leave at dark and get home at dark so I wont be doing anything until the weekend... Thanks again!
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Jim Z

in2hockey wrote:
I have a 13kw Generac that I "inherited" from my Boss. I've talked about here in other threads. The model # is: 0052530 and the serial is: 4904677
My question is what's the typical cranking time for these units when they're cold. This unit doesn't start until the second round of cranking. It almost starts on the first round but then pauses and starts almost immediately on the second round. I checked and adjusted the valves, the exhaust were both tight, almost no clearance. The closest intake was at about .008 and the far intake was within spec at .004 I set the other 3 valves to .004, replaced my plugs and gapped at .040
If this is normal for a cold crank time so be it but I feel like it should start easier.... Any thoughts would be appreciated! Thanks!!

In2Hockey:  I have a 16kw model 0052430 that behaves exactly like yours.
Have exhaustively gone through the fuel system: choke plate flush, new gaskets, valve job, new seals, LP set to 13.5, and still takes 2 cycles to start. 
Have also replaced the original 2-brush starter with a 4-brush version, cranks a little faster.
May be just the way it is with these older models. 

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in2hockey


@Jim Z 
I'm the one that originally installed this unit but that was a decade ago and I have zero recollection if that's the way this unit has always started or not.... That was a lot of brain cells ago... ðŸ˜‚ 
I still plan on double checking everything that others have been gracious enough to recommend doing, just for good measure but I'm starting to think that "it is what it is". Thanks!

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in2hockey
So I kind of decided that "it is what it is" and haven't done any additional testing and over the last several months everything been status quo. I don't have the unit set to "Auto" because should there be an outage when we're not home it would really be unnecessary to have the generator run. In our area the temps rarely stay below freezing for any length of time. With that said this means that the weekly exercise doesn't run so I've been manually running the unit every Saturday or Sunday morning for about 10-15 minutes then shutting it down. Yesterday I was running it and after about 15 minutes it shutoff randomly on its own and as I walked toward it to see what gives it fired back up right away and kept running. I let it run for about another 10 minutes and it didn't do it again. Of course no load was on the unit... Any Ideas???? I can check WC but is there a port for me to connect my gauge or do I have to do some plumbing modifications? Thanks! 
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78buckshot
You will find two ports on the demand regulator, the top port will be live and can be used to measure static pressure and running pressure, I didn't see anywhere in the post what fuel you are running. Natural gas static pressure should be about 7.5" w.c., LP static should be 12.5" - 13.5", with either gas it should drop no more than 1" between static and running.
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in2hockey
78buckshot wrote:
You will find two ports on the demand regulator, the top port will be live and can be used to measure static pressure and running pressure, I didn't see anywhere in the post what fuel you are running. Natural gas static pressure should be about 7.5" w.c., LP static should be 12.5" - 13.5", with either gas it should drop no more than 1" between static and running.


Thanks 78buckshot, running LP. I ran the unit for an hour today without issue but I'm a firm believer that if it happened once it will happen again and this time at the most inopportune time....  
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