Generator Removal for 1998 B-190

2800 MicroLite by Onan
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tdashmike
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Generator Removal for 1998 B-190

Post by 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 778 times
Bolt #2 Location:
Bolt 1.jpg
Bolt 1.jpg (41.41 KiB) Viewed 778 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 778 times
Last edited by tdashmike on Mon Jul 16, 2018 9:36 am, edited 5 times in total.

tdashmike
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Re: Generator Removal for 1998 B-190

Post by 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
IMG_2872.jpg (87.61 KiB) Viewed 756 times

tdashmike
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Re: Generator Removal for 1998 B-190

Post by 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 755 times

tdashmike
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Re: Generator Removal for 1998 B-190

Post by 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
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Voltage Regulator:
IMG_2884.jpg
IMG_2884.jpg (78.1 KiB) Viewed 754 times
Last edited by tdashmike on Mon Jul 16, 2018 9:39 am, edited 2 times in total.

tdashmike
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Re: Generator Removal for 1998 B-190

Post by tdashmike » Mon Jul 16, 2018 8:58 am

Continued...

Remote Plug:
IMG_2886.jpg
IMG_2886.jpg (94.62 KiB) Viewed 751 times
Comparment:
IMG_2888.jpg
IMG_2888.jpg (103.5 KiB) Viewed 751 times
Carburetor Part Number:
IMG_2889.jpg
IMG_2889.jpg (46.26 KiB) Viewed 751 times
Last edited by tdashmike on Mon Jul 16, 2018 9:39 am, edited 3 times in total.

tdashmike
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Re: Generator Removal for 1998 B-190

Post by 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 749 times
Float:
IMG_2892.jpg
IMG_2892.jpg (96.09 KiB) Viewed 749 times
View From Air Intake:
IMG_2893.jpg
IMG_2893.jpg (68.07 KiB) Viewed 749 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
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Re: Generator Removal for 1998 B-190

Post by tdashmike » Wed Jul 18, 2018 1:53 pm

The generator runs pretty good now. A little bit rough at idle but not too bad. At least the generator doesn't shutdown when the A/C compressor kicks on now.

This is what it sounds like right now:
https://youtu.be/eRGV7Jzm4IA

Let me know if that sounds and looks normal to you.



Found a tip that might be useful:
https://www.youtube.com/watch?v=AaUDaYO8kPY

Basically remove the 2 intake elbow screws and the carburetor will come out.

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Alaskan
Site Admin
Posts: 808
Joined: Wed Mar 21, 2007 12:00 am
B190 Year: 1999
WBCCI: 0
Location: Alaska and Washington

Re: Generator Removal for 1998 B-190

Post by Alaskan » Sun Sep 02, 2018 1:19 pm

Good post and information, with pictures....thanks

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usachris
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Posts: 182
Joined: Sun Mar 12, 2017 5:31 pm
B190 Year: 1999
WBCCI: 1422
Location: Costa Mesa, California

Re: Generator Removal for 1998 B-190

Post by usachris » Mon Sep 03, 2018 11:56 pm

tdashmike wrote:
Wed Jul 18, 2018 1:53 pm
This is what it sounds like right now:
https://youtu.be/eRGV7Jzm4IA
Let me know if that sounds and looks normal to you.
Yup. That sounds pretty good. I pulled the original Onan generator on my 99’ due to it failing and installed a 2012 Onan. That was the last model year that was compatible with the generator hole on my B190. In 2013 the Onan Microlight grew an inch taller and sadly would not fit. I installed a new factory carb, fuel pump, fuel filter, spark plug and air filter and she purrs like a kitten now. I ran the generator for about 8 hours a day for a five days straight and couldn’t have been happier with the performance.
A0657064-0062-43D4-B338-67DAA7840960.jpeg
Getting ready to install new parts
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2CF09D6B-D8C9-473A-A81F-20C62A4A7DB7.jpeg
Used the “2 Bolt” trick to drop the carb
2CF09D6B-D8C9-473A-A81F-20C62A4A7DB7.jpeg (3.02 MiB) Viewed 495 times
EE32DCC7-371F-4D5A-8EDA-0506130BFF6A.jpeg
Almost done. Just electrical connections left.
EE32DCC7-371F-4D5A-8EDA-0506130BFF6A.jpeg (2.98 MiB) Viewed 495 times
There was lots of cleaning up to do after this job was finished :wink:
Christopher Salazar
1999 B190 #301352
WBCCI #01422 Region 12, Unit 19

tdashmike
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Re: Generator Removal for 1998 B-190

Post by tdashmike » Wed Sep 05, 2018 9:21 am

Glad you were able to find a newer one and got it working smoothly! Mine has bee working well ever since also.

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190-b-651
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Joined: Fri Jun 03, 2016 4:35 pm
B190 Year: 0
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Re: Generator Removal for 1998 B-190

Post by 190-b-651 » Fri Sep 14, 2018 3:49 pm

Good information 2017 onan
1993 b190 you need to remove the door to install it.
On my 93 anyway I was told the same thing by a few places. Industrial electric saved the day huge on the west coast electric motor and generator shop.Image

Sent from my SM-J727T1 using Tapatalk


tdashmike
Seasoned Traveler
Posts: 102
Joined: Mon Jun 11, 2018 6:17 am
B190 Year: 1998
WBCCI: 0

Re: Generator Removal for 1998 B-190

Post by tdashmike » Wed Sep 19, 2018 8:42 am

That's good to know, thanks.

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