I have a VentoV-Thunder Classic, 248cc, sat a long time,had to clean out fuel tank and carb and alsofuel related part located under right side of tank. Engine will start every time with full choke on,as soon as you hit the accelorator throddle the engine bogs and die's

how about the plugs or fuel line itself could be a bad fuel pump wihich are in the tank ck the fuel pressure

remove carbs and rebuild completely, old fuel builds shellac in needle valves and other ports. clean float valves thoroughly, and check choke for proper operation

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

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, ``

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, oo

still a carb issue, you may have to remove them and **** out holes.

The leak at the fuel tank is not related. Sorry. What you have is a blockage in the carb itself. Take it back off, take it apart and carefully clean all the orifices. In the plate under the primer bulb, there is a one way valve. Make sure it is clean, use aerosol carb cleaner and spray thru the valve. Remove the locks from the adjustment screws and remove the jets one at a time and blow carb spray thru them also. If you did not replace the strainer screen before, replace it now. It is located under the plate nearest to the fuel inlet. When reassemble, make sure the gaskets are in the same order as the originals. Diaphragm side...paper gasket against the carb body, then diaphragm. On the inlet side, thin cellophane first, then the thicker gasket, then the outer plate. The adjustment screws should be turned out 1.5 to 2.0 turns.
Good luck!

fuel line goes from gas tank to carb. and from carb. to primer bulb and back to tank.
make sure you put a new primer bulb on it.

stored gasoline begins to deteriorate/lose octane/after only two weeks.drain fuel tank label and disconnect fuel lines at petcock,remove petcock from tank,clean fuel screen.re-assemble,check for supply to carbs. Honda's of that vintage have a seperate 'reserve' tank under the battery,which tends to collect all the 'crud',and must also be purged.trace your fuel lines to see if your unit is so equipped,

first of all i would change the spark plug, then change fuel and makle sure ,carb is letting in fuel make sure , float is not stuck