Our rig is about 2 yrs old with a 4000KY Onan gen set. It has about 160 hrs on it and runs smooth and well. It is used and cycled regularly (about every 2 weeks for 1-2 hours) under load. But of late its started a loud and noticeable intermittent clicking sound. I note no deterioration in its running, it runs smooth, no error codes, starts relatively easily.I pulled the cover to check for rubbing on the cowling but the clicking continues.Any ideas what to suspect? My mind is thinking its an impending fuel pump issue?

My hour meter clicks, maybe you just never noticed it before.

Thanks for the follow up beemerphile1.Mine sounds rather loud and irregular. Is the sound you hear like that? Seems to have appeared recently- last 10 hours or so?

Hour meter clicks are very regular and shouldn't be too loud. I think mine are once every 3.6 seconds (i.e. every 1/100 of an hour). Presumably it's from the little escapement doohicky that drives the reels of the meter.

americanrascal wrote:Thanks for the follow up beemerphile1.Mine sounds rather loud and irregular. Is the sound you hear like that? Seems to have appeared recently- last 10 hours or so?Nah, the meter clicks at regular intervals but mine is loud.

Thanks guys. The lack of regularity and the loudness then would tell me not the hour meter. Guess I might better order a new fuel pump to have on hand??

Onan 4000 KY Clicking sound? | Good Sam Community

16 Replies

TEXAS
Explorer
Dec 16, 2015
I would unplug the pump. With the unit off. Run a jumper wire over to the pump. If it comes on very loud probably bad.It should pulse until it builds up pressure and then slow down.
americanrascal
Explorer
Dec 16, 2015
Thanks guys. The lack of regularity and the loudness then would tell me not the hour meter. Guess I might better order a new fuel pump to have on hand??
beemerphile1
Explorer
Dec 15, 2015
americanrascal wrote:
Thanks for the follow up beemerphile1.
Mine sounds rather loud and irregular. Is the sound you hear like that? Seems to have appeared recently- last 10 hours or so?

Nah, the meter clicks at regular intervals but mine is loud.
DrewE
Explorer II
Dec 15, 2015
Hour meter clicks are very regular and shouldn't be too loud. I think mine are once every 3.6 seconds (i.e. every 1/100 of an hour). Presumably it's from the little escapement doohicky that drives the reels of the meter.
americanrascal
Explorer
Dec 15, 2015
Thanks for the follow up beemerphile1.
Mine sounds rather loud and irregular. Is the sound you hear like that? Seems to have appeared recently- last 10 hours or so?
beemerphile1
Explorer
Dec 15, 2015
My hour meter clicks, maybe you just never noticed it before.

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Onan 4000 KY Clicking sound?

16 Replies

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