Question about Watts Onan Portable Generator - 4000 , Model# 5500

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Can i use synthetic oil in my new onan 6500 portable generator

What brands and types of oil do you recommend for use in 10 to 100 degree weather

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Johndeere 10w-30 in cooler weather and 5w30 in warmer weather. Any auto parts store has small engine oil. They may have a better idea when you go to purchase your oil for your particular climate.

Posted on Jan 10, 2009

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What oil filter & how much & what kind of oil onan 5500 diesel generator


Mobil1 20-50 Synthetic Oil
Onan recommends 15-40 oil.

May 27, 2016 | Power Generators

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Onan marquis 5000 model # 5bgmfa26105f runs for a few minutes and shuts off. let it cool off and it will start again. whats the problem?


There are many possible reasons from stator output voltage to sensing, to fuel to control boards. A good place to start (as the unit does run) would be with the fuel system, if it has sat a long time it won't help. Also the fuel filter. try conencting to an external fuel tank versus the vehicles, as sometimes pick up tubes in main tanks can be an issue. Also check the correct oil level and viscosity / and oil pressure switch. Failing that I recommend a service center, as there really are so many causes, I cannot list all on here.

Aug 01, 2013 | Watts Onan Portable Generator - 5000 ,...

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Starts easily, run for 5 to 20 minutes and then


If the fuel filter (strainer) is OK, carb gives enough fuel for the load you apply, air filter is dry and clean, your problem may be the low oil level protection.
Check if generator is at level position.
After the oil is distributed in all the engine its level may go less than the measuring sensor level. Try to put some more (not much) oil. 
If this will not help your measuring sensor may be bad and switch off when the oil gets hot.

Jul 26, 2010 | Watts Onan Portable Generator - 5000 ,...

1 Answer

How to fix a genset 6500 generators that stops when you turn starter switch loose?


Check the oil level or any other alarm that can stop it.
The switch may have lost its middle stable position and drop directly to stop.
Try after you have the switch up for starting, let it easy back in middle position. If there it stops again. Try to move the switch down to "Stop". You should hear a click. If not replace the switch with the same type.

Jun 10, 2010 | Watts Onan Portable Generator - 5000 ,...

1 Answer

Need battery for Onan 6500 Generator


I have searched but cannot actually find what type male of battery it uses, other than it is a Lead Acid Battery. Now with lead Acid batteries, it is the actual Capacity, in Both Amperage output, and Physical capacity. So based upon that ANY 12 V DC Wet Cell battery of the SAME Physical size, and CURRENT capacity will work. Look on the actual battery itself, it WILL/Should have identifying marks written on it. Get one the same, it is NOT all that critical.

May 23, 2010 | Watts Onan Portable Generator - 5000 ,...

1 Answer

Onan Portable Generator - 5000 , Model# 6500: I have china generator capacity is 2700 watts but ...


Alternately,



• Turn-off all lights first.

Run your pump or water start motor.



• When the motor is running,

Turn on the lights , one at a time.

May 18, 2010 | Watts Onan Portable Generator - 5000 ,...

1 Answer

Lincoln Welder Generator Oil Question


Better late then never! im-308 total lube oil is 4 pints for a briggs and stratton engine
.
and 3.5 for an onan engine with filter change.

Note: an internal kill switch will shut down the engine if the oil level drops below a minumum

operating level on the onan engine only.

on your welder use a multi-viscosity sae sj grade or better oil. recommended is 10w-30.

if you work in cold environments use 5w-30 oil , it's thinner and will flow easier

during cold starts. Synthetic oil is better. just more expensive. change oil at least

every 100 hours for better performance. good luck!

Aug 19, 2009 | Lincoln Electric Ranger Gxt 250 Amp...

1 Answer

I just bought a 1999 Winnebago with an Onan 6500 genset. It only has 45 hours on it. It will run for 15 - 20 minutes with the AC on and then quits. It will restart after a few minutes and go through the...


a 10 year old genset with only 45hrs on it...sound like the carb may need replace. working with these rv units for 6+ years has taught me that you cannot clean one well enough to fix it. you will need a new carb. your local onan dealer can help. when new the warrenty makes known that 1hr per month under load will keep the carb clean and problem free. evaporating gas leaves deposits and eventualy plug fuel jets. no replacement parts are recommended. i've personaly worked on rv's with 200+ hous and no issues at all. hope this helps, good luck...

Jul 12, 2009 | Watts Onan Portable Generator - 5000 ,...

1 Answer

Oil type for Onan 4000 generator


SAE 15W-40 is what i used to use
synthetic? not sure about that one there may be oil pres switch that could give you a problem.

Apr 04, 2009 | Watts Onan Portable Generator - 4000 ,...

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