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Generac GP5000 Alternator

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BrianC View Drop Down
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Joined: 16 Jun 2011
Location: New York
Points: 1619
Post Options Post Options   Thanks (0) Thanks(0)   Quote BrianC Quote  Post ReplyReply Direct Link To This Post Topic: Generac GP5000 Alternator
    Posted: 09 Aug 2020 at 6:48pm

On long Island we had high winds, knocked down
many power lines. It went off Tuesday afternoon, back up
Sat**day 7:45PM. In the meantime I started up the
5000 watt Generac GP5000 power generator.
What a gas hog and noisy as heck. I had it running only the essentials.
At one point it started running poor, sputtered backfired and stopped.
Problem no compression, cause was a stuck open exhaust valve.
I got it unstuck with brass hammer to tap in, pliers and pry bar to retract, and 2 hours of working it with carb cleaner and PB blaster.  I changed the oil and it started and ran normal.
I don't thick the head has pressed in valve guides , just the aluminum. How cheesy is that? What do you think was the root cause of the sticking? I suspect cooked gummy oil or galled up aluminum on the valve stem (I am assuming no bronze or steel valve guides).

So nice to not have to hear to it now. And thanks to the Ohio and Indiana tree cutters and electrical crews whom traveled east to help out.

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jaybmiller View Drop Down
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Joined: 12 Sep 2009
Location: Greensville,Ont
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2020 at 8:55pm
sounds like it don't get regularily run ( say once a month for a 1/2 hour,under load) ??

new, seldom used engines NEED to be run every so often...

that being said, I reacquired a 5HP leaf shreader today..sat for 2-3 years in a barn. I tossed gas into the tank and 2nd pull she started and ran fine for 1/2 hour. I suppose I should check the oil...dang thing was made in 1994 !!! I really didn't expect it to run so tomorrow I should do an oil change....

3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water
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tadams(OH) View Drop Down
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Joined: 17 Sep 2009
Location: Jeromesville, O
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tadams(OH) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2020 at 12:45pm
My Generax generator starts and runs once a week automatically
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