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Fuel line routing form TB90BC - Troy Bilt Tb70ss Gas Trimmer

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Hi, i don't really understand what you mean by fuel line routing form TB90BC.

Take care

Posted on Jul 10, 2010

  • patbuckley Jul 10, 2010

    fuel line routing for TB90BC trimmer

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Need to know what 3 lines from fuel tank go


The pump line, or feed line, goes to the fuel filter and then to the engine's fuel rail. A return line leaves the fuel rail and sends gas back to the tank. Usually, the feed line is slightly larger than the return line, not always.
The third line is a vent line for emission controls-routing gas fumes from the tank to the charcoal canister, where it is stored and later sent to the engine to be burned.

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Poulanprop fuel line routing diagram


in 1980 it is pretty much forward from fuel tank to fuel pump from fuel pump to carburetor ....the return line from pump to tank

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Troy bilt weed eater


I have a troy built 2 cycle pro-line tb90bc spring assist trimer.
its getting fuel and it wouldn't start I took out the spark plug and it was wet with fuel. pls fwd any info to ss.beepat@hotmail.com

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TB90BC WON'T START


hello sir, my machine will only start when pumping primmer bulb or squirting fluid in the carburetor than stops. the fuel line has broken off, in most small carburetors this is a ongoing problem.old fuel will crystallize when left in tank for a long time.plugging up ports, fuel lines, small screen in carburetor.fuel lines will dissolve clogging carb.this is why it will run when the choke is on creating a vaccum to where there is fuel forced in the carb to rum,also the gas will evoporate leaving the oil behind clogging up carb.the thing to do is remove carb. and clean out,replaceing gaskets or fuel line if necessory.use carb cleaner to clean out carb.make sure to make note where fuel line go.the fuel filter broke off of fuel line letting debris get in carb plugging it up.the muffler is known to clog up a lot on these machines where thay want run. the compression should be 60 to 120 lbs any thing below 60 is junk. when adjusting the carb screws turn in all the way than turnout 1 1/4 turns turn in slow untail machine runs also you need to check for spark by removing plug and grounding aginst engine to chech spark, ok.a new spark plug would be a good ideal too , if you are going to make these repairs use new fuel line and filter,hope this helps,any comments welcome,thank you, ``

Feb 06, 2012 | Troy Garden

1 Answer

Fuel line routing for craftsman chainsaw 358.350370


hello sir,routing fuel line for craftsman,homelite,ryobi,hedge and line trimmers,fuel tank under engine, looking at machine from rear, shall fuel line on left with filter attached goes to bottom port of carb, fuel line from right side coming out of tank with inside tip attached goes to bottom port of primmer bulb,top line on primmer bulb goes to top port of carb, fuel tank under engine,fuel line routing,looking at machine from left side, left fuel line coming out of tank(drain back only) goes to right side small port of primmer bulb, left side larger fuel line from primmer bulb to top port of carb, fuel line coming out of tank (larger line) on the right side with filter attached goes to bottom port of carb, when replacing fuel line it is very important to use the same ID and OD line the homelite takes a special line that is black in color and a bigger size,the bigger line is ID .08-OD140 small line ID3/32 X 3/16.when the lines dissolve small pieces will get in the carb clogging small passages and screen,it is advisable that you clean out carb,and use a new filter.hope this helps,any comments welcome,thank you. if the filter has broken off of the line half way that is where you will run out of fuel, hh

Jan 11, 2012 | Garden

3 Answers

Need diagram / pictures of routing of all fuel lines. 1981. CX500 Custom


It's hard to find diagram for older bike.
I got the pic from the tank to pet ****.
LINK HERE
mustgo_8.gif
mustgo_73.jpg

Aug 10, 2011 | Honda CX 500 B Motorcycles

1 Answer

Troybilt TB90BC fuel line schematic? I have replaced fuel lines that degraded with age and am uncerttain about the correct hook to tank, carburetor and primer. A diagram would help


easiest way to tell you is that the primer is there to pull the fuel through the carb. so fuel filter line goes from tank to carb, then from carb to primer and then back to tank as a return. if you forget which is the in line for the carb just hook with gas in a jar and try sucking it out of the jar. put filte rin a jar. and run line to carb , then line out of carb to primer and line back to jar as a return. if it pulls freely and fills the primer bulb your ready to go. if it pulls hard or not at all something is wrong.

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1 Answer

Troy-Bilt weed eater, Model TB90BC, had rotten fuel lines and primer bulb, I replaced but may have hooked them up wrong. How do I hook them up?


Prime and watch the fuel move up to the carb. This is the fuel line and it should be long. Make sure it goes to the bottom of the fuel tank.

Apr 04, 2010 | Troy -Bilt String Trimmer/Blower...

1 Answer

Primer bulb won't prime


it sounds like the filter on the fule line is cloged try to remove the filter and then try to prime the trimmer. it it does you need to replace the filter. just about any filter that will fit will do.

Jun 05, 2009 | Troy Bilt Tb70ss Gas Trimmer

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