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Old 08-28-2015, 11:50 PM   #1
Join Date: Jan 2015
Location: Montana
Posts: 49
Which Onan Generator?

I've been shopping for a generator for my Nitro 30fqsl. I ordered it prewired and pre-plumbed for gasoline, but without a generator. Apparently it would come with an Onan 4000, but there are two Onan 4000 generators for RVs, both 4.0 KW rated and both in identical cases. My question is "Do I need the "Evap" model - which is $140.00 more or is the non-evap model OK? Electric Generators Direct sell both models for use in RV's but pushes the Evap model. What does Forest River install? I can't find anything online from the company that lists which generator they install.

2015 XLR 30FQSL
2010 Dodge 2500 6.7 Cummings
2003 H-D Ultra Classic
25 days out 2016

Illegitmi Non Carborundum
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Old 08-29-2015, 06:27 AM   #2
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Join Date: Feb 2015
Location: Florida
Posts: 219
Which Onan Generator?

I received an EVAP model on mine, from the factory.

I believe the EVAP series has more emission controls for more stringent regulations, such as California.

See this link:

Nitro 31FQSL
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