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1978 Onan 6.5NH Tune Up


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Old 01-22-2018, 12:12:52 AM
billyrb billyrb is offline
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Default 1978 Onan 6.5NH Tune Up

I have a 1978 Wanderlodge with an onan 6.5NH-3CR/12894D. I want to give it a tune up, wondering if anyone knows the part numbers for air filter, spark plug wire, oil filter, etc?
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Old 01-22-2018, 12:48:00 AM
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lokay5 lokay5 is offline
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Default Re: 1978 Onan 6.5NH Tune Up

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Originally Posted by billyrb View Post
I have a 1978 Wanderlodge with an onan 6.5NH-3CR/12894D. I want to give it a tune up, wondering if anyone knows the part numbers for air filter, spark plug wire, oil filter, etc?
Before you do anything to your NH - check the condition of the ignition points and the ignition condenser. If they're bad, nothing you do will make a difference.
I suggest you start there, but others will certainly disagree.
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Old 01-22-2018, 07:18:23 AM
Kevin K Kevin K is offline
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Default Re: 1978 Onan 6.5NH Tune Up

Stop by the Twinslan site: http://www.twinslan.net/~n0nas/manuals/onan/

Download the manuals for your spec D 6.5NH

940-0501 service
940-0221 parts
940-0223 parts
940-0121 operator
900-0186 wiring diagrams

Your wiring diagram is 611-1142 on page 63 of the wiring diagrams manual.
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Old 01-22-2018, 11:34:09 AM
armandh armandh is offline
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Default Re: 1978 Onan 6.5NH Tune Up

Onan parts https://onanparts.com/index.php?main_page
provided points plugs and condenser for a 6.5-KW NH.
auto parts store for the oil filter.
and, if needed, shop carefully for a LOW PRESSURE fuel pump

a 1978 motor home pull-out is now my daughter's house hold back-up
it had not run in 10 years, points and pump were way bad. now runs great.
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