OhNan

C

cbwoodsr

New member
Apr 25, 2000
1,466
0
1
Midwest City Ok
www.gmcmhparts.com
Finally, success..
Moved my coach so I would have gas to it and it started right up on the
coach batteries.
(Thanks to Duane Simmons who overhauled the board and Tim Dawson who
adjusted the relays..)

Now What?
Guess I'll have to go find another difugulty to fix. Will take a mini-trip
and see what pops up.

CBWood
77Kingslay(er)
MWC OK
(On Digest, Home)
 
Charles -
Glad to hear your success story, and glad to be of help!

- - Tim

[Charset iso-8859-1 unsupported, filtering to ASCII...]
> Finally, success..
> Moved my coach so I would have gas to it and it started right up on the
> coach batteries.
> (Thanks to Duane Simmons who overhauled the board and Tim Dawson who
> adjusted the relays..)
>
> Now What?
> Guess I'll have to go find another difugulty to fix. Will take a mini-trip
> and see what pops up.
>
> CBWood
> 77Kingslay(er)
> MWC OK
> (On Digest, Home)
>
>
>
>

- --
================================================================================
Tim Dawson (tadawson) Owner/Engineer
TPC Services Bellnet: (972)-221-7385
Lewisville, Texas 75067 FAXnet: (972)-221-0393
"The world is complex. Sendmail.cf reflects this...."
 
AFAIK clean the carb and adjust the choke. Worked for me, many moons ago.
Darren

> What would cause the gen to start cycling? (Speeding up and slowing down)
> After I finally got it where it would start, it starts doing this after a
> while.
>
> CBWood
> 77 Kingsley
> MWC OK
> (on digest at home)

- --
Darren Paget
76 Experimental
Another Fab Day
http://www.TZEplus.com
 
>What would cause the gen to start cycling? (Speeding up and slowing down)
>After I finally got it where it would start, it starts doing this after a
>while.
>
>CBWood
>77 Kingsley
>MWC OK
>(on digest at home)

sounds as if the governor is not adjusted right. There is a
procedure in the GMC maintenance manual telling how to solve this
problem. Also be sure to lubricate the linkage before you do the
adjustments.

Emery Stora
77 Kingsley
Santa Fe, NM
 
I had this problem and the electronic ignition fixed the problem. When I
removed the points they had quite a large point and pit in the middle

gene

>AFAIK clean the carb and adjust the choke. Worked for me, many moons ago.
>Darren
>

>
>> What would cause the gen to start cycling? (Speeding up and slowing down)
>> After I finally got it where it would start, it starts doing this after a
>> while.
>>
>> CBWood
>> 77 Kingsley
>> MWC OK
>> (on digest at home)
>
>--
> Darren Paget
> 76 Experimental
> Another Fab Day
> http://www.TZEplus.com
>
>
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/
 
I'm sure you already have the points, carburetor and trouble shooting
advice. I've also had it cycle like that when low on oil. The oil pressure
fluctuates and the sensor shuts it down only to have the pressure come back
and allow it to recover. It'll do that for quite a while before stopping
entirely. Good luck.
Bob McLaughlin

- -----Original Message-----
From: owner-gmcmotorhome
[mailto:owner-gmcmotorhome]On Behalf Of Charles Wood
Sent: Monday, June 05, 2000 10:11 PM
To: gmcmotorhome
Subject: GMC: OhNan

What would cause the gen to start cycling? (Speeding up and slowing down)
After I finally got it where it would start, it starts doing this after a
while.

CBWood
77 Kingsley
MWC OK
(on digest at home)
 
I had the same problem last Fall. I fixed it this Spring by replacing the
ball joint in the linkage. Apparently over the years the joint had developed
a spot where it was binding. No amount of lubrication would fix it. There
was no way to detect that it was binding without actually removing the joint
and playing with it. It seemed normal when on the engine. The bad ball joint
helped contribute to the generator over speeding one day to the point where
it blew out my microwave due to the high voltage. It also smoked a surge
protector that my TV was plugged into. After replacing the ball joint, it
runs just fine and no over speeding.

I only found the cause of my problem after I had replaced everything that I
could think of that would cause the Onan to surge. I replaced the governor
spring, the ball joint, spark plugs, points & condenser and spark plug
wires. I was going to order an electronic ignition package, but I already
had the new points and plugs. I found the problem with the ball joint after
I had it out and spent a few minutes inspecting it.

So my advice is to make very sure that your ball joint is in good condition.

Richard Waters

> What would cause the gen to start cycling? (Speeding up and slowing down)
> After I finally got it where it would start, it starts doing this after a
> while.
>
> CBWood
> 77 Kingsley
> MWC OK
> (on digest at home)
 
I finally removed and cleaned my carb today, I think I have figured out my
probs..
When I took the gas line loose from the pump, no gas seeping out...1st flag.
after taking the bowl loose, no fuel in bowl..2nd flag..
cleaned inside of bowl, put a new gasket on, since the top 1/3 was 'pulled'
down leaving a small gap at top of manifold..

Also had a 'whoops' and a 'whew' when cleaning out the screen in the bowl.

Had a can of carb cleaner and a can of gold paint sitting side by side..
went to spay some carb cleaner on screen and though it funny that the fluid
was gold colored...(Whoops)
remembered reading on carb cleaner can that it will remove paint,
so....(Whew)
Otherwise that fixed my 'cycling problem.
Ran it for awhile with/without load and ran fine..
Pushed it in and ran it again..whoops, died after awhile..
checked back gas line and noticed it would 'fold' up when I pushed it in..so
started it outside, running ok. than pushed it..after a while it started to
cycle and tried to die.
I immediately pulled it back out and it recovered fine..
Now I need to shorten rear gas line so it wont fold up..

Otherwise. looks ok now..

CBWood
77 Kingslay
(On digest, at home)
 
Nice going, New gas line will also help because now it has a permanent
crimp. The Primer circuit will also help so that you do not have to crank
so long.

I would / did, not think of a crimped gas line.

gene

>I finally removed and cleaned my carb today, I think I have figured out my
>probs..
>When I took the gas line loose from the pump, no gas seeping out...1st flag.
>after taking the bowl loose, no fuel in bowl..2nd flag..
>cleaned inside of bowl, put a new gasket on, since the top 1/3 was 'pulled'
>down leaving a small gap at top of manifold..
>
>Also had a 'whoops' and a 'whew' when cleaning out the screen in the bowl.
>
>Had a can of carb cleaner and a can of gold paint sitting side by side..
>went to spay some carb cleaner on screen and though it funny that the fluid
>was gold colored...(Whoops)
>remembered reading on carb cleaner can that it will remove paint,
>so....(Whew)
>Otherwise that fixed my 'cycling problem.
>Ran it for awhile with/without load and ran fine..
>Pushed it in and ran it again..whoops, died after awhile..
>checked back gas line and noticed it would 'fold' up when I pushed it in..so
>started it outside, running ok. than pushed it..after a while it started to
>cycle and tried to die.
>I immediately pulled it back out and it recovered fine..
>Now I need to shorten rear gas line so it wont fold up..
>
>Otherwise. looks ok now..
>
>CBWood
>77 Kingslay
>(On digest, at home)
>
>
Genef -- 77PB/ore/ca
GMC MOTORHOME INFORMATION
mr.erf
http://www.california.com/~eagle/
 
You must log in or register to reply here.
Applied GMC
GMCMI Fall 2026 Rally

Share this page

Share this page
Top Bottom
Back