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Car Forum / Driving, Maintenance, Tuning / RVs / January 2008Kohler 6.5KW CZ generator blowing fuse
I have a gas powered 6.5 KW Kohler generator Model 6.5CZ that blows the 10 amp input fuse whenever I shut it down from the engine mounted or remote kill switches. It then won't restart until I install a new fuse. Does anyone have any idea what would be causing this? The unit starts & runs fine, and for now, I stop it by removing the fuse and then replace it once it is shut down. There is a second fuse, but this goes to the battery charging system and seems to be unaffected by the stopping sequence. I have this posted to a couple of boating & RV groups so I hope someone can help me on it. Please feel free to respond to my email directly if you're reluctant to respond to the group. Thanks in advance. >I have a gas powered 6.5 KW Kohler generator Model 6.5CZ that blows > the 10 amp input fuse whenever I shut it down from the engine mounted [quoted text clipped - 10 lines] > > Thanks in advance. Obviously the "kill" switch energizes a relay or solenoid to either interrupt ignition or fuel. I am not familiar with gas generators but on a diesel, the kill switch usually energizes a fuel supply solenoid. I'd look to see what that fuse is supplying power to and I suspect whatever it is ... is bad. Eisboch > >I have a gas powered 6.5 KW Kohler generator Model 6.5CZ that blows > > the 10 amp input fuse whenever I shut it down from the engine mounted [quoted text clipped - 18 lines] > > Eisboch Could an improper ground of the controlled component cause the blown fuse, or would it be more likely that the component itself is gunny sack? As an electrical duffer, my other horseback guess might be a short circuit in the wiring connecting the switches to the controlled shut- off component. Could the generator be stopping because the fuse is blown by bad wiring in the control circuit rather, than due to any reaction to the switch(es)? On Jan 26, 6:15?am, "Eisboch" <r...@nowhere.com> wrote: > "GSS" <gssmith1...@yahoo.com> wrote in message > [quoted text clipped - 23 lines] > > Eisboch Could an improper ground of the controlled component cause the blown fuse, or would it be more likely that the component itself is gunny sack? As an electrical duffer, my other horseback guess might be a short circuit in the wiring connecting the switches to the controlled shut- off component. Could the generator be stopping because the fuse is blown by bad wiring in the control circuit rather, than due to any reaction to the switch(es)? Giving the OP's post more thought, If the generator shuts down ok by *removing* the 10 amp fuse that normally blows if using one of the kill switches, it suggests that a solenoid or something is *energized* while running. The kill switches must interrupt the power to something .... same as removing the fuse. Therefore, I'd probably be looking for a wiring problem. Eisboch > On Jan 26, 6:15?am, "Eisboch" <r...@nowhere.com> wrote: > [quoted text clipped - 48 lines] > > - Show quoted text - Thinking it through, I believe the kill switch grounds the voltage from the coil voltage to the block, so it doesn't reach the spark plug...before it gets to the spark plug, shorting the voltage between the coil and the spark plugs, which ceases the spark, and causes "input" fuse is what it's marked. When the fuse is blown, the starter won't run. It is only a 10 amp fuse so I don't think the power for the starter runs THRU the fuse, but the fuse must protect some sort of contactor or solenoid which closes the circuit for the starter. I thought there might be something on the toggle switch that is shorting, but it seems to blow the fuse whether the remote kill switch or unit mounted switch is used to kill the generator. > "input" fuse is what it's marked. When the fuse is blown, the starter > won't run. It is only a 10 amp fuse so I don't think the power for [quoted text clipped - 3 lines] > shorting, but it seems to blow the fuse whether the remote kill switch > or unit mounted switch is used to kill the generator. I am not an expert and there are others here that may have more exact knowledge, but I think your starter solenoid is bad. Eisboch >If the generator shuts down ok by *removing* the 10 amp fuse that normally >blows if using one of the kill switches, it suggests that a solenoid or >something is *energized* while running. The kill switches must interrupt >the power to something .... same as removing the fuse. I have an Onan diesel generator that works pretty much as you describe. There is a solenoid which must be activated for the generator to start and continue running. If an over temp or low oil pressure sensor trips, power to the solenoid is interuppted and the generator stops. It will not restart until a reset button is pressed. When you press the stop button, a relay is activated which interrupts power to the solenoid. My guess would be a short circuit or defective shut down relay. >>If the generator shuts down ok by *removing* the 10 amp fuse that normally >>blows My Maytag washer and drier have the wiring diagrams pasted to the inside of the removable sheet metal access panels. Maytag is no more, unfortunately. Casady >>>If the generator shuts down ok by *removing* the 10 amp fuse that >>>normally [quoted text clipped - 5 lines] > > Casady Whirlpool still use the Mmaytag name but the appliances aren't what they used to be... re massive recall last year. >>>>If the generator shuts down ok by *removing* the 10 amp fuse that >>>>normally [quoted text clipped - 8 lines] >Whirlpool still use the Mmaytag name but the appliances aren't what they >used to be... re massive recall last year. Maytag is still very much in business. Check <http://www.maytag.com> In addition they own many other brands such as Whirlpool, Amana, etc. George  SignaturePosted via a free Usenet account from http://www.teranews.com >>>>>If the generator shuts down ok by *removing* the 10 amp fuse that >>>>>normally [quoted text clipped - 13 lines] > > George eerrr...i think you have that backwards...Whirlpool bought Maytag. I know this because I was one of those affected by the inner door/control panel fiasco last year. Finally got a new dishwasher out of it. > <wwe...@mungedhughes.net> wrote in message > [quoted text clipped - 25 lines] > > - Show quoted text - The input fuse is the fuse which protects the whole control panel...I've determined that from the schematic which was as a previous poster suggested. The stop sequence activates a number of relays any one of which could be shorting & blowing the fuse. The engine is killed from a "fuel solenoid", which I believe connects to the Carbeuretor and may choke the engine. I found a kohler parts schematic and it looks like I'll need to replace the whole panel...the relays are not removable. Thanks for all the help! You must disconnect all generator load before shutting it down or you can damage both the generator or the load. Perhaps there is an automatic disconnect that is now not functioning. Try manually unplugging all loads, then shutting down. Steve >I have a gas powered 6.5 KW Kohler generator Model 6.5CZ that blows > the 10 amp input fuse whenever I shut it down from the engine mounted [quoted text clipped - 10 lines] > > Thanks in advance. >I have a gas powered 6.5 KW Kohler generator Model 6.5CZ that blows >the 10 amp input fuse whenever I shut it down from the engine mounted [quoted text clipped - 10 lines] > >Thanks in advance. What's an "input fuse"? I may be blowing wind, and I have no experience of this rig, but a mechanism that comes to mind is this: the engine slows, the generator volts drop, and the field regulator boosts the current to hold the output voltage, blowing a field current fuse. Brian W > There is a second fuse, but this goes to the battery charging system > and seems to be unaffected by the stopping sequence. � > Thanks in advance. Fuses have other characteristics than Amps. What type does the owners manual recommend? > I have a gas powered 6.5 KW Kohler generator Model 6.5CZ that blows > the 10 amp input fuse whenever I shut it down from the engine mounted > or remote kill switches. This may not be related. However, I have a 20kw Kohler that kept blowing fuses for no reason. I found out the improper fuse was installed. A 10 amp high heat ceramic fuse should have been used. The heat given off from the generator engine would heat up the fuse, and de-rate it. A ceramic fuse is designed to operate in high ambient temperatures. I hope this helps. John |
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