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Honda gx390 governor falling back to 3200rpm? #4749931
05/07/18 07:56 AM
05/07/18 07:56 AM
Joined: Nov 2009
Posts: 5,219
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,219
Houston, Texas
What causes the throttle control arm to not stay at 3600 rpm? I can manually move it all the way over and it will go to 4000 then let go and it will go to 3600 then slowly work it's way to 3200rpm no load, 2800rpm under load. This is a pressure washer with 9hrs on it.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman] #4749951
05/07/18 08:32 AM
05/07/18 08:32 AM
Joined: Aug 2003
Posts: 13,418
NE,Ohio
Rand Offline
Rand  Offline

Joined: Aug 2003
Posts: 13,418
NE,Ohio


2019 Jeep Cherokee Trailhawk 2.0T
Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman] #4750051
05/07/18 11:11 AM
05/07/18 11:11 AM
Joined: Sep 2016
Posts: 181
MN
Tman220 Offline
Tman220  Offline

Joined: Sep 2016
Posts: 181
MN
There is probably a nut you can tighten down that will increase the rotating friction of the throttle arm.


2012 Regal GS Turbo PP 5w30
1994 Camaro Z28 LT1 355 CI, 430 RWHP PP 5W30
Re: Honda gx390 governor falling back to 3200rpm? [Re: Tman220] #4750177
05/07/18 01:22 PM
05/07/18 01:22 PM
Joined: Nov 2009
Posts: 5,219
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,219
Houston, Texas
Originally Posted By: Tman220
There is probably a nut you can tighten down that will increase the rotating friction of the throttle arm.


There is, but I'm not sure if that will affect how the governor operates. I guess the throttle lever is different than the governor arm. What causes it to change? It worked okay in the beginning afaik.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman] #4750846
05/08/18 07:30 AM
05/08/18 07:30 AM
Joined: Sep 2015
Posts: 1,691
USA
mk378 Offline
mk378  Offline

Joined: Sep 2015
Posts: 1,691
USA
The speed control lever is supposed to stay where you set it because of friction from the pivot nut. If it does not stay, tighten the nut. If it is too hard to move, loosen the nut. That will not affect anything else.

Last edited by mk378; 05/08/18 07:33 AM.
Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman] #4751644
05/08/18 10:30 PM
05/08/18 10:30 PM
Joined: Sep 2004
Posts: 2,428
snowblind in TX
punisher Offline
punisher  Offline

Joined: Sep 2004
Posts: 2,428
snowblind in TX
The spring controls your governed speed. Off chance the wrong spring was installed, or maybe the engine is supposed to run at 2800 RPM loaded.

Re: Honda gx390 governor falling back to 3200rpm? [Re: punisher] #4752651
05/10/18 07:23 AM
05/10/18 07:23 AM
Joined: Nov 2009
Posts: 5,219
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,219
Houston, Texas
[quote=punisher]The spring controls your governed speed. Off chance the wrong spring was installed, or maybe the engine is supposed to run at 2800 RPM loaded. [/quote

It ran at the correct rpm for a few hours atleast. I'll go ahead and tighten that nut and then maybe turn the stop screw in a little bit so it runs at 3600rpm and not 4000 when all the way against it.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman] #4753567
05/10/18 10:04 PM
05/10/18 10:04 PM
Joined: Nov 2009
Posts: 5,219
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,219
Houston, Texas
I tightened the nut. It stays in place now, haven't started it up yet though.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Honda gx390 governor falling back to 3200rpm? [Re: motor_oil_madman] #4754812
05/12/18 07:50 AM
05/12/18 07:50 AM
Joined: Nov 2009
Posts: 5,219
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP

Joined: Nov 2009
Posts: 5,219
Houston, Texas
Worked like a charm.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

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