Generator Starts but won't continue running/dumpimg fresh fuel into filter
Not knowing your exact model # or how old it is, and knowing only what
you said above - TOTAL RUN HOURS unknown as well? - I can
only give you several possibilities
of what the problem might be - even though I don't know the exact model
# and which engine you have on the Genset. Porter Cable as well as Coleman and others do not themselves mfr much of
anything today, but like with many USA companies out there today it
does private label out to a lot of mfg vendors (mostly in China btw),
and the Genset gas engines are numerous. From Briggs & Stratton to
Honda to Subaru and so forth...
I also don't know what normal LOAD you were putting on your Genset there, or have been putting on it previously, or at what
RPM you are normally running the engine at - as to half throttle or full throttle
setting?? I take it that it's a Briggs & Stratton 4-stroke single
cyl, or is it a Honda 4-stroke single/twin cyl engine?
Any Genset that is going to be put into storage for that long a period
of time I would first and foremost recommend running the Carb Bowl dry
first by running the Genset at FULL speed, and while running turning
off the gas until it dies. Thus removing as much gas from the Carb
Float Bowl as possible!
Most people do not do this and forget about that small amount of stale
gas in the Float Bowl, and that is what causes VARNISH in the Carb Bowl
faster then anything else.
Just putting a gas preservative in the gas tank doesn't solve the
VARNISH problem because that never gets down to the Carb to begin with
if the gas line shut-off valve is closed before the preservative gets
If the Float decides to stick while in storage, and then it's brought
out to fire up naturally the gas will flood out the Carb and probably
the Air Filter Box as well.
It's always better to store the Genset DRY! I know I do and I have NO problems at all with stale gas, etc.
Since all Gensets need to be run a minimum of 10 minutes every 30 days
(every 1 month religiously), or whatever your owners manual recommends
- if you haven't been doing this, or don't run the gas out of the Float
Bowl before shutting the Genset down after each use - then most likely
the Carb is gummy or possibly has dirty gas in the bowl and is the
I seriously doubt you did any damage to the engine by the recent gas over-run and flooding.
You might try and tap carefully on the bottom or side of the Float Bowl
with a hard rubber hammer first to try and see if you can dislodge the
stuck Float inside. If there is a WIRE at the bottom of the Float Bowl
on your model - DO NOT HIT THAT GAS SHUT-OFF SOLENOID WITH THE RUBBER
HAMMER - as you will do damage to it! If this dislodges the stuck Float
then your problem is solved!
You may still want to run a bottle of Carb Cleaner in the tank just in
case to clean out any residual buildup in the Float Bowl, etc. If it
runs fine then No Problem.
First and foremost always check your OIL LEVEL and make sure you have changed it out according to your owners manual!!!
If your Genset still runs sporadically for only a short time and then starts to cut out I would look more for like a fuel vapor
lock (partially closed or clogged gas cap vent), a possible dirty fuel
filter, possible water moisture in the gas tank or in the Carb bowl,
possibly dirty Carb in general along with it's dirty Float Bowl, Float Pin, Float and Needle Valve, and any Adjustment Screws that go Into the Carb Body.
It's hard to say unless the Carb first is broken down, checked for
proper Float action setting, and/or cleaned out accordingly if dirt is indeed
present in the bottom of the Float Bowl.
If all looks good there Carb Bowl wise then you will next need to check
the FLOAT adjustment itself to make sure you aren't flooding the Bowl.
Your Operators/Service Manual should have that adjustment there. If not
let me know and I'll post it for you. Also the air/fuel mixture Jet
Adjustment Screws will need to checked as well.
Let me know if you should need that adjustment procedure as well after you first check out
everything else I stated above?
That covers everything from a fuel standpoint.
Again - You do know that all Gensets should be started and run for at least 10
mins every 30 days - right? If you didn't know this - now you do! Every
good operators manual should state this.
It just doesn't sound like it's starving for gas - that's for sure!
The gas tank fuel line does have an in-line fuel filter correct? If it
doesn't you definitely need to add one for dirt protection!!
Having covered everything from an fuel standpoint
engine wise - there is only one other thing left Genset wise.
Beings your Genset there might just have some high RUNTIME HOURS on it - it just could very possibly
be what sounds like to me (and I personally HAVE SEEN this
happen myself firsthand) that the generator brushes are nearly shot
- as in almost worn out. They may be getting too too hot - as from
excessive current draw at point of contact, and thus the generator
sensing circuitry itself is doing an electrical CUTOUT!!
An added protective Genset circuit feature in that the generator itself
may indeed be linked to the engine as a type of REV LIMITER or CUTOUT on the Maintenance-free Magnetron® electronic ignition.
Again - your operators or service manual should have a pretty good
troubleshooting section in it unless you don't have that anymore or
never got one if you bought it used to begin with.
If you unscrew & remove the Generator brushes, and they are indeed
below the recommended length (or worse case they are indeed totally
worn down) then that too most likely could be your problem right there.
If you choose to replace the old brushes with new ones yourself - be
very careful when seating the new ones - as to their insertion and cap
retainer tightening. Never over-tighten those black plastic-like brush
retainer screw caps - for if you break one (hard to get immediate
replacements is why), or fracture one it could cause the Genset to fail
under LOAD, and that very well could do some severe damage to the
generator part itself. Take your time doing it, and be patient!!
It has to be one of the scenarios listed above, as I've covered every
possible cause short of a broken wire somewhere - which in that case
you will have to schematic trace and Ohm out wire to wire contacts.
This being the least likely scenario from experience.
If you indeed find the Float Bowl assy to be the cause of dirt
contamination or varnish build-up clogging the Carb, and you need a
walk-through of taking it apart, cleaning it out, and then
re-assembling it again - as well as re-adjusting the fuel mixture Adjustment Screws - just give me a shout here, and I'll walk you through it step by step.
Please post me a reply as to the found problem there, and the resolve
to it by following my recommendations above. Also please rate my
troubleshooting fix as well.
Keep me posted and I'll follow up as well.
GENERATOR OIL CHANGE NEGLECT
starting issues often are not using fuel stabilizer or not changing
their oil. I myself or any good repair shop will first pull the oil out, and most times we'll will find that it has metallic
build up common from any small gas engine that has been neglected.
Aug 28, 2008 |