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Author Topic: Multiquip generators - runs until loaded  (Read 923 times)

Tim McCulloch

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Re: Multiquip generators - runs until loaded
« Reply #10 on: June 23, 2021, 12:36:20 AM »

Diesel?  Replace the fuel filter(s).  Pre-fill with fuel if possible.  Treat fuel in tank with a diesel biocide.
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Mike Caldwell

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Re: Multiquip generators - runs until loaded
« Reply #11 on: June 23, 2021, 07:40:43 AM »

Diesel has a fuel pump, no question.
You have Glow Plugs to preheat the combustion chambers, not Spark Plugs to ignite the fuel.
It is a compression ignition engine. Electric has nothing to do with your problem.
It is a fuel problem. Probably not enough volume/pressure once the motor is under load.
Chris.

At least one high pressure fuel/injector pump and maybe a pump before the injector pump. 
There will be cut off valve in the fuel line at some point as well.

Chris Hindle

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Re: Multiquip generators - runs until loaded
« Reply #12 on: June 23, 2021, 08:16:06 AM »

At least one high pressure fuel/injector pump and maybe a pump before the injector pump. 
There will be cut off valve in the fuel line at some point as well.
I worked in automotive, not Genny's, but a diesel is a diesel.
Medium pressure, high volume pump in the tank, with the (high pressure, low volume) Injection Pump/distributer at the motor.
Saw many occasions where the engine would start, and stall when dropped in gear. A simple gauge  on the inlet of the injector pump showed not enough fuel being drawn from the tank.
I suspect that is the problem here.
Blocked filters are the first place to look, of course.
A diesel not run often is an unhappy diesel........
Chris.
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Mike Pyle

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Re: Multiquip generators - runs until loaded
« Reply #13 on: June 23, 2021, 11:53:51 AM »

Many gen sets are equipped with automatic and remote start/stop relays incorporated into the regulator panel. There could also be shutdown relays for engine fault conditions (low oil pressure, overheating, etc). You need to determine first if the fuel system is being shut down by one of these control mechanisms, or by a mechanical issue with the governor or linkage, or by fuel supply problems as others mentioned. Systems may use solenoids connected to mechanical linkage, or to a fuel shutoff valve.
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Steve-White

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Re: Multiquip generators - runs until loaded
« Reply #14 on: June 30, 2021, 05:21:22 PM »

Restricted fuel lines or blocked carburetor is one possibility....

Yep.  Carb hosed, fuel filter clogged up or moisture in tank - or all of the above.

Put a can of Berryman's or Sea Foam in it and run the tank empty with whatever load it will handle.  Change fuel filter, clean or replace oil filter.

When test running a generator always run it steady stare with 25-50% load and a few good pulls at full load.  Full load testing is the only way to know if they are working correctly.

Also check the oil level in the crank case, and the low oil sensor if it has one.

Or, simply take it to your mechanic and let him do it.
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Re: Multiquip generators - runs until loaded
« Reply #14 on: June 30, 2021, 05:21:22 PM »


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