2002 Monster 750 ie cranks but won't start

[Chelle]

I have been perusing the forums and seen a few posts regarding these type of issues.

So to summarize: the engine cranks and cranks but won't catch

What's been tested:
Fuel pump whirs and can hear liquid trickling
Relays: exchanged out for Borg Warner R3223
Spark Plugs: gets spark on both not flooded with fuel
Battery: load tested at 13
Fuel: drained majority of tank no water
Fuses: all good
Fuel lines: minor 'squish' testing looked for impedence
Kick Stand Sensor: in first wont even crank
Connections: as many as I can find no water or gunk
Air Filter: clean
Starter Fluid: into intakes she will catch for a bit then back down to cranking

Factoids. Bike was started early am cut off high idle and died only would crank from there
Bike bought from dealer after sitting - fuel pump replaced new
Harness to Battery is brand new replaced by dealer

Did pull the plastic device from the tank (plastic) I speculate this is the fuel filter??? May be completely wrong waiting on the Haynes manual to get here to know what the part really is. Was covered in an odd orange powder.  I can post a photo shortly.

Officially I think it's a fuel issue but I'm at a loss.

I wanted Zen and The Art of Motorcycle Maintenance I got it...  Gremlins and all.

Thanks to all for any input. I've worked on cars, replaced engines in them etc but a bike is a whole new beastie.

[brle7817]

Sounds like your head is in the right place with the fuel system. Where do you hear the trickle? In the tank?

I just resurrected my '02 M750 ie and after getting the fuel pump to function, the only noise I can hear now is the whir at first turn of the key.

I'd try to isolate that trickle first, because that's likely where your fuel is going. Bad/disconnected fuel line and/or possible clogged filter.

[ducpainter]

Your fuel filter should be steel.

A pic of this plastic device would help.

[Chelle]

Here is said device:



Mounts (O-Ring and Plastic Nut) into the bottom of the gas tank - has a neg and positive lead coming out the side and going deep into the tank.

[ducpainter]

Here is said device:



Mounts (O-Ring and Plastic Nut) into the bottom of the gas tank - has a neg and positive lead coming out the side and going deep into the tank.

That is the fuel level sender.

The wires entering the tank feed voltage to the fuel pump, which is accessed from the top by removing the cap and then the cap holder.

Those units have been known to fail both by no longer registering fuel level and also not feeding voltage to the pump.

You say your pump whirrs, so it is at least still supplying voltage.

You shouldn't  hear fuel trickling unless the tank is almost empty. You're going to have to put that back in, don't over tighten and crack the plastic nut, and remove the cap and holder to check to see if you have a loose or split fuel line.

By the amount of 'mung' on the sender I wouldn't be surprised if the filter, which will be visible when you open up the top, was clogged.

An inexpensive aftermarket alternative is available from NAPA #3032. It isn't exact, but thousands have been used successfully.

[Ddan]

That's the sending unit for your low fuel light and the two wires go to your fuel pump.  #5 is the part in your hand, #12 is the filter.  +1 to your filter probably being full 'o crap, while you're in there this woiuld be a good time to flush out the tank

[Chelle]

Thanks DDan and ducpainter for the awesome feedback. Once corporate America releases me I will get back out in the garage again and get the tank emptied and pull the filter. Hopefully get this sorted out quickly since the weather here in the NW is finally feeling like Spring.

[Chelle]

And she's fixed and running like a champ again. After pulling the fuel cap and locating the fuel filter. Lo and behold the fuel feeder line was disconnected. I did purchase a spare fuel filter but have not at this time installed it. After reconnecting the fuel line to the filter and putting the fuel cap back on for protection she started up like a champ!  Couldn't have done it without the help of these forums. Really appreciate all the great advice and feedback!  Now on to Spring!!

[vasol]

im having similar problems with my monster.  i think the fuel filter is clogged...due to rust/debris in the gas tank.  but i took it out and blew through it...would say its at 75% not too bad.  what fuel filter is #4?  can anyone shed any light on this ive only read about replacing the #12 fuel filter never seen the #4 before

[ducpainter]

im having similar problems with my monster.  i think the fuel filter is clogged...due to rust/debris in the gas tank.  but i took it out and blew through it...would say its at 75% not too bad.  what fuel filter is #4?  can anyone shed any light on this ive only read about replacing the #12 fuel filter never seen the #4 before

#4 is a mesh screen to protect the pump from picking up big chunks.

Typically they don't need replacing.

[vasol]

awesome thanks!