Darn Bobcat again

[MAC702]

Many of you might remember my rantings about the Bobcat over the years. The only Miller product I cannot recommend. A lot of it has had to do with my dad's experiences with his Bobcat 225NT, about 2 years old now. Here's a problem that surfaced last summer and perhaps you guys have a remedy, other than putting a match down the tank after he runs it dry.

The fuel line overheats and vaporlocks the thing when it runs in the summer heat. Even putting a wet rag around it only prolongs the inevitable. It runs fine in cool weather.

I have had no problems with my TB301G, of course.

Do you think an auxiliary fan blowing air across the engine compartment might do the trick? Any other ideas?

[boilerman]

is rerouting the fuel line and option????? is the line steel or rubber????with EPA regs. they leaned out the small engine so they could come into emmision guide lines and it is making trouble for some

[7018]

The fuil line is rubber and it has a spring in it because it is shaped in a (u).The only trouible I've had was a whole in the line and it squirting on the plug.Lucky it didn't catch fire.Maybe your fuil line isn't passing enough gas through it.Thats all I can offer to help you.

[DDA52]

Mac
Are you sure it is the fuel line? I have seen/heard of some of the fuel pumps that weren't acting right when they got hot. Symptom was just like a vapor lock. Just a thought.

I have the same pump in question on my new engine. I will be holding my breath a little when it gets over 90 in a month or so. If I have a prob, it'll show up then.

Do you still have the TB to unload??

[DDA52]

Mac
I forget...Kohler or Onan? The baddish pumps were Onan.

[moe1942]

To isolate the problem use another tank and gravity feed fuel to the engine. Disconnect the existing fuel line at the carb, that way you eliminate the units entire fuel feed system.

If the unit runs fine on gravity feed then all you have to do is track down the offending component. Starting at the tank you should have a screen on the fuel pickup tube. Take low pressure air and back flush. Use a strong concentrated light and check the tank for debris. If the fuel hose is original I would replace making sure it is marked fuel hose. Also replace the fuel filter. If you still have the same problem replace the fuel pump.

If you do it in this order you go from the least expensive to the most.

Hope this helps. Good luck and let us know the rest of the story.

[Franz]

There was a posting on the Miller Board a while back from the Subaru rep pointing out Miller/Onan was failing to handle some problems properly, and I think he posted an 800 number for Subaru.
Might be worth doing a search.

Here's the thread
http://www.millermotorsports.com/mbo...ghlight=subaru

[ROCK]

Give Lloyd A Shout At Portable Power.................miller Electric.........bet He Can Help............. Reroute Is A Good Option As Is Wraping The Line In A Heat Reflection Type Tape .................

Have Heard Of The Problem Before Be Me I Would Check The Operating Temp................. Might Be On The High Side..............
\

[Shade Tree Welder]

Originally Posted by DDA52

Mac
Are you sure it is the fuel line? I have seen/heard of some of the fuel pumps that weren't acting right when they got hot. Symptom was just like a vapor lock. Just a thought.

I have the same pump in question on my new engine. I will be holding my breath a little when it gets over 90 in a month or so. If I have a prob, it'll show up then.

Do you still have the TB to unload??

I had the fuel pump go out on my mower, Kohler engine, the mower is 10 years old the diaphram just got old; but it acted just like vapor lock too. New pump was ~$40 and a breeze to replace zero problems since.

[MAC702]

Yeah, it's an Onan. Will let you know what Dad discovers.