Onan 5500 Gold starts right up when its cold, even after sitting all off season, but once its good and warm it wont start back up until its sat and cooled for probably an hour or more. Any ideas? No codes show up. Just cranks and acts like it not getting fire.

sounds like a bad fuel pump to me

ck choke assy when it cools the thermal lets the buterfly release

Sfla2 wrote:ck choke assy when it cools the thermal lets the buterfly releaseThat sounds probable. What and how do I check it?.

not to sure abt how, find a onan guy or somebody fimilar w 1 but NOT CW

I've owned my marquis 5500 since. 06The governor spring went out on mine cause the same issue .The cummins cross point serviced with a new governor.$197 installed so less if you do it your self.

Onan wont start hot | Good Sam Community

16 Replies

offtohavasu
Explorer
Aug 05, 2014
Could be governor like mentioned above causing the frequency to be off, or could be fuel pump heating up and failing.
htr1
Explorer
Aug 03, 2014
I've owned my marquis 5500 since. 06

The governor spring went out on mine cause the same issue .

The cummins cross point serviced with a new governor.

$197 installed so less if you do it your self.
Sfla2
Explorer II
Aug 03, 2014
not to sure abt how, find a onan guy or somebody fimilar w 1 but NOT CW
mr__old_style
Explorer
Aug 03, 2014
Sfla2 wrote:
ck choke assy when it cools the thermal lets the buterfly release

That sounds probable. What and how do I check it?.
Sfla2
Explorer II
Aug 03, 2014
ck choke assy when it cools the thermal lets the buterfly release
newman_fulltime
Explorer II
Aug 02, 2014
sounds like a bad fuel pump to me

Forum Discussion

Onan wont start hot

16 Replies

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