Generator Removal for 1998 B-190

2800 MicroLite by Onan

Generator Removal for 1998 B-190

Postby tdashmike » Fri Jul 13, 2018 5:06 pm

Hey guys, I want to document the removal process a little and also maybe get some tips. This is currently a work in progress.

Removal Process:
1. Disconnect the negative terminal of the house battery.
2. Loosen the 2 nuts on the u-bolt connecting the exhaust pipe to the muffler. No need to take the nuts off, just loosen them 5 to 10 turns or so.
3. Remove the 2 bolts holding the generator in place.
4. Remove any drain pipes.
5. Lift the generator out and place it on something sturdy. The bottom of the compartment opening is roughly 28" off the ground.
6. Remove the gas hose and clamp it.
7. Remove the cover. There are 2 torx screws on either side holding the cover in place.
8. Service as needed.


What I did for maintenance:
1. Changed the air filter.
2. Changed the fuel filter.
3. Changed the fuel pump.
4. Cleaned the float bowl and main jet and passages with metal wire, wire brush and some carb cleaner.
5. Held the choke and throttle open and sprayed half a can of carb cleaner into the carburetor intake. Drained the carb cleaner out after a few hours by taking the spark plug out. Be careful, carb cleaner will come pouring out of the spark plug hole.
6. Re-gaped the spark plug and scrubbed the spark plug down with wire brush and carb cleaner.
7. Performed voltage and frequency check and adjusted the main jet and governor as necessary. The main jet is just the altitude adjustment knob.


U-bolt and Bolt #1 Location:
Bolt 2.jpg
Bolt 2.jpg (41.16 KiB) Viewed 85 times


Bolt #2 Location:
Bolt 1.jpg
Bolt 1.jpg (41.41 KiB) Viewed 85 times




It looks like I need to go get a pipe wrench or something, someone added a drain pipe so I will have to take the pipe off in order to get the generator out. The reason I'm taking it out is because the generator will shut down when my AC compressor comes on although whenever the compressor kicks on for the first time when I start the generator it'll be fine. It's when it gets to temp and shuts down and restarts does the generator shut down. To mitigate this issue on the last trip I just set the thermostat to the coldest setting and it would run fine. Any tips is appreciated.

Drain Pipe:
Drain Pipe.jpg
Drain Pipe.jpg (62.4 KiB) Viewed 85 times
Last edited by tdashmike on Mon Jul 16, 2018 9:36 am, edited 5 times in total.
tdashmike
Weekend Camper
 
Posts: 48
Joined: Mon Jun 11, 2018 6:17 am

Re: Generator Removal for 1998 B-190

Postby tdashmike » Mon Jul 16, 2018 8:50 am

Finally got the drain pipe off after a couple of hours. It was really hard to work blindly and in such a small space. The other thing was the pipe was in 3 parts so you had to remove them in order or the pipe won't come out because the barb part would hit the support on the side.

Something else that seems odd is that I think the pipe is 1/4" NPT but I think the drain plug is in metric?

IMG_2872.jpg
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tdashmike
Weekend Camper
 
Posts: 48
Joined: Mon Jun 11, 2018 6:17 am

Re: Generator Removal for 1998 B-190

Postby tdashmike » Mon Jul 16, 2018 8:54 am

Other photos:

IMG_2879.jpg
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IMG_2878.jpg
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IMG_2880.jpg
IMG_2880.jpg (84.29 KiB) Viewed 62 times
tdashmike
Weekend Camper
 
Posts: 48
Joined: Mon Jun 11, 2018 6:17 am

Re: Generator Removal for 1998 B-190

Postby tdashmike » Mon Jul 16, 2018 8:57 am

Continued...

There is supposed to be a gasket between the intake fan and the metal sheet but the gasket is completely gone. I noticed some of the foam that was used on the generator is deteriorating so the foam gasket was probably sucked through the intake fan at some point. Without the gasket, hot air would be sucked in instead of the cool air from the front. I plan on fixing this with some thick high temp aluminum backed insulation. I also noticed that the storage compartment beneath the generator and the couch above it gets really warm when the generator is running. I plan on adding insulation under the couch and above the storage compartment to improve this. Cold air is pulled in from the front and goes out the hole on the bottom where the exhaust pipe is and that is blowing straight onto the storage compartment.

IMG_2883.jpg
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IMG_2885.jpg
IMG_2885.jpg (88.18 KiB) Viewed 61 times

Voltage Regulator:
IMG_2884.jpg
IMG_2884.jpg (78.1 KiB) Viewed 61 times
Last edited by tdashmike on Mon Jul 16, 2018 9:39 am, edited 2 times in total.
tdashmike
Weekend Camper
 
Posts: 48
Joined: Mon Jun 11, 2018 6:17 am

Re: Generator Removal for 1998 B-190

Postby tdashmike » Mon Jul 16, 2018 8:58 am

Continued...

Remote Plug:
IMG_2886.jpg
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Comparment:
IMG_2888.jpg
IMG_2888.jpg (103.5 KiB) Viewed 60 times

Carburetor Part Number:
IMG_2889.jpg
IMG_2889.jpg (46.26 KiB) Viewed 60 times
Last edited by tdashmike on Mon Jul 16, 2018 9:39 am, edited 3 times in total.
tdashmike
Weekend Camper
 
Posts: 48
Joined: Mon Jun 11, 2018 6:17 am

Re: Generator Removal for 1998 B-190

Postby tdashmike » Mon Jul 16, 2018 9:11 am

Continued...

Float Bowl and Main Jet After Cleaning:
IMG_2891.jpg
IMG_2891.jpg (84.72 KiB) Viewed 58 times


Float:
IMG_2892.jpg
IMG_2892.jpg (96.09 KiB) Viewed 58 times


View From Air Intake:
IMG_2893.jpg
IMG_2893.jpg (68.07 KiB) Viewed 58 times


I have to say the carb didn't look too bad, I was expecting it to be gummed up from sitting around so long. Below is a thread on adjusting the carb which I'll be doing also as soon as I can get the oil drain plug back in and I'll also be adjusting the governor according to the service manual.

https://www.smokstak.com/forum/showthread.php?t=127454
tdashmike
Weekend Camper
 
Posts: 48
Joined: Mon Jun 11, 2018 6:17 am


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