My Onan NHE 6500 just started with this problem. Starts fine and will run for 30 minutes with a/c on. Shuts off and will restart if I wait about 3 minutes and runs for another 30 or so minutes. If I try to start it before the 3 minutes, starter cranks but engine won't catch. Gas tank is over 3/4, oil is full, new air cleaner, so I'm at a loss.

Oil level in the generator correct? When did you chamge the generator fuel filter?Do the simple things first.

Possibly the oil is thinning out and reducing the oil pressure enough to trip off the generator engine. You may want to try 10W30.

gbopp wrote:Oil level in the generator correct? When did you chamge the generator fuel filter?Do the simple things first.Yes and fuel filter changed 9/14, about 250 hours ago

w4phj wrote:Possibly the oil is thinning out and reducing the oil pressure enough to trip off the generator engine. You may want to try 10W30.But 2 -3 minutes wouldn't be enough for oil to cool that much that it would run another 30, would it?

Romer1 wrote:w4phj wrote:Possibly the oil is thinning out and reducing the oil pressure enough to trip off the generator engine. You may want to try 10W30.But 2 -3 minutes wouldn't be enough for oil to cool that much that it would run another 30, would it?Saw it happen before. Bad oil. Easy to fix.

Generator runs 30 minutes, shuts off | Good Sam Community

16 Replies

WellShooter2
Explorer
Jul 19, 2017
Romer1 wrote:
gbopp wrote:
Oil level in the generator correct? When did you chamge the generator fuel filter?

Do the simple things first.

Yes and fuel filter changed 9/14, about 250 hours ago

@60 mph 250 hrs would equal 15,000 miles.
w4phj
Explorer
Jul 19, 2017
Romer1 wrote:
w4phj wrote:
Possibly the oil is thinning out and reducing the oil pressure enough to trip off the generator engine. You may want to try 10W30.

But 2 -3 minutes wouldn't be enough for oil to cool that much that it would run another 30, would it?

Saw it happen before. Bad oil. Easy to fix.
Romer1
Explorer
Jul 19, 2017
w4phj wrote:
Possibly the oil is thinning out and reducing the oil pressure enough to trip off the generator engine. You may want to try 10W30.

But 2 -3 minutes wouldn't be enough for oil to cool that much that it would run another 30, would it?
Romer1
Explorer
Jul 19, 2017
gbopp wrote:
Oil level in the generator correct? When did you chamge the generator fuel filter?

Do the simple things first.

Yes and fuel filter changed 9/14, about 250 hours ago
w4phj
Explorer
Jul 19, 2017
Possibly the oil is thinning out and reducing the oil pressure enough to trip off the generator engine. You may want to try 10W30.
gbopp
Explorer
Jul 19, 2017
Oil level in the generator correct? When did you chamge the generator fuel filter?

Do the simple things first.

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Generator runs 30 minutes, shuts off

16 Replies

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