Question about Honda Electrical Supplies
Need assistance in understanding if this is a common condition when the auto-throttle control unit is faulty. Unit runs at reduced RPM even when under load. Seems to run at full RPM when turngin auto-throttle off.
From your description and what you do , the problem is in the auto control unit
it will be in the system to reduce the rpm to idle when there is no load ( auto mains on off controller switching between genset and mains supply)
by turning the auto operation off you are committing the gen set to full rpms regardless of the power requirement
you have the option of having it fixed at an gen set repair shop or leaving it off and starting the genset only when you have a mains power outage
check with an electrician to ensure that it is possible to run it that way as if the mains power unit is not correct , when you start it and you still have mains power , it will destroy the gen set
Posted on Dec 13, 2016
Testimonial: "Thank you: To clarity some points: I do not plan to have the generator hooked up to my house (mains power). I plan to plug my freezer and fans into it when residential power goes out. This is mainly to keep the frozen items frozen. I am prepared to purchase and install a auto-throttle control unit if that is what is needed to get the unit to idle up when I (for example) plug a 500 watt light bulb into it. Currently the light will be dim unless I turn the Auto Throttle system off. When I turn the auto throttle system off the light get bright and the engine runs at full RPM. I would like a method to verify that the Auto-Throttle control unit is bad with with a DMM (or other simple tools). It is possible to test the Auto-Throttle unit in such a manner? thanks again."
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Posted on Jan 02, 2017
SOURCE: on my EF30ISEH generator. cold,
Hi and welcome to FixYa, I am Kelly
First off I am just trying to help you and not participating on the FixYa site for the money. I have been working on small engines and generators since the late 1960's.
This is usually caused by the speed limiter assy. (Not a cheap part)
SPEED LIMITER ASSY 7WL-85680-02-00
Item 22 this link:
The feedback wiper in the speed limiter is either dirty or worn. When you re-position the throttle arm the feedback wiper is making good contact again so it works normally. It appears that the feedback wiper in the speed control is not making good contact at full RPM so it does not drive the throttle linkage to idle.
If your careful dependng on the design of your speed control you just might be able to take the cover off and clean it up so the wiper makes contact. Wht ever you do DO NOT lift the wiper arm up. You will bend it and never be able to get it to function again. Just clean it. You can use sand paper but... be real careful.
If your speed control is 100 % electronic with only a small DC motor actuator you may have to see if you can clean the brushes and armature slip rings of the internal DC motor.
I have brought several speed controls back to life but it really is a major game of chance anytime you open one up. Just know that your stuck with a very expensive replacement cost for a speed control unit if you screw it up. ----
----It is not a bad thing to keep using your generator with a defective / improperly functioning speed control. As you know is just will not throttle down.
The part number listed above is for the original part number and has been superceded by another part number:
The ($60.00) service manual for this generator is available from Yamaha by PN: LIT-19616-CM-20
Anywhere else the manual is $80.00!
Thanks for choosing FixYa,
Posted on Feb 02, 2011
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