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This is very important that the connections are correct. The fuel is pulled through the carburetor to purge all the air before starting. Air will keep the fuel pump from refilling the carburetor when attempting to run.
A filter is attached to the end of the fuel tube located in the tank. This hose is the fuel pickup and passes through a tight hole in the tank. The other tube is the return also from the carburetor and is open on the end returning inside the tank also fitting through a tight hole in the tank.
It is easy to reverse these tubes. If one has cracked it is likely all need to be replaced. Take pictures and take notes before starting.
Reversing the hoses allows for unfiltered fuel to fill the carburetor with the result of plugging the jets.
New carbs aren't known for leaking unless you had it open and altered some thing. A float can get stuck if you let it sit without using it. Should put stable in your tank and run it so thestable gets into the carbs. Check above the carb for a gas leak from the gas hoses and check the gas tank. They may be running down onto the carb and just appears like the carbs leaking
This is a simple repair.
1. Drain tank save fuel can be used again
2.Purchase fuel line replacement kit Lowes -Home Depot
3.Kit needs to contain feed wire and gas hose.
4.Disassemble cover to reveal fuel line connection to carb.
5. Feed wire from kit into fuel tank through fuel line hole.
6. Install new hose over wire connecting end into hook at end of wire
7. Pull hose through tank up to the carburetor
8. Remove wire and connect filter and hose to carburetor
9. Replace gas into tank, Ck for leaks
If you just want to get through the smog test,they usually allow one monitor test to be incomplete and still pass.
If your area does,clear the codes and fill the fuel tank to the top.The other monitors should run and complete but the fuel tank monitor will not run with a full tank of gas so will not turn on the check engine light related to a tank vac leak.KEEP THE TANK FULL,and go get your smog test!
1. remove the hose from the carb and see if the petcock is shutting off the gas and if not clean, repair or replace the petcock. 2. look in the tank and see if it has rust in the tank even a small haze of rust as rust will cause the needle and seat to stick in the carb and make the gas leak. If the gas tank has a lot of rust it may need a tank rubber liner kit added or even a new tank to stop the leaking. 3. if the bike has been sitting for a while it may have trash in the fuel system(carb/petcock/tank). Rust or any trash can cause a leak. Properly clean out the carb and fuel system and add a new filter when done. 4. Improperly adjusted or bad needle/seat or float in the carb will cause continual leaking. Replace the needle/seat/float and adjust the new one when installed. Check your service manual for float adjustments.
Possible plastic hose running from fuel tank to primer or from fuel tank to carb is broken or cracked. Remove cover to access the carb and inspect hoses for cracks or being broken. Also inside fuel tank the hoses can break off and not be notice from the outside. The hoses can be replaced but not easily. Small engine parts store should have fuel hose.
Three days ago I replaced the section of fuel hose on one of these between the fuel filter and carb. It had cracks that would let air into it causing a similar situation to yours. I found the problem by injecting air from an air hose nozzle into the gas tank with a rag taking up the major dimension difference between the air nozzle and the 2 inch gas cap which was removed. Be extremely careful not to blow up the tank or otherwise cause excessive pressure on the fuel system, but when I then looked for any leaks, I found a half-cup of gasoline on the floor of the shop under the carb area which is plenty dangerous enough. I you find ANY wetness along the length of the fuel hose it is time for a new hose, mine cost me $1.60 a foot at NAPA for generic 1/4" gas hose. You don't have to pay more.
As a prophylactic measure you also don't need any excuse for just changing out your old fuel lines...
This post helped me with my McCulloch Mac 3216 chainsaw. There are two holes in the gas tank - one above the other. One is for the gas line (with the filter on the end) and the other is for the overflow - a simply line that runs from the "out" nipple on the primer bulb into the gas tank. The filtered fuel line goes to the nipple on the back of the carb. Another short line goes from the "in" nipple on the primer bulb to the nipple on the front of the carb.
There are two notches just out from the two holes in the gas tank for holding the lines that go in -- this may help you locate the holes.
I found it helpful to pull the lines that go into the gas tank out through the gas cap hole and leave them hanging out until the housing was reassembled. I also left the lines that plug into the primer bulb hanging out through the hole where the bulb goes until the housing was put back on. Leave plenty of extra line for the lines going out to the primer bulb. Once the housing is in place, cut the lines to the primer bulb and attach them, and slip the lines into the tank, making sure the ends are as far down in the tank as possible. You will need this extra "slack" to work with the housing to get it back on.
If you have an EVAP leak, you will get the following codes:
1. P0442 evap emission control system leak (small). 2. P0455 evap emission control system leak (large).
If these codes come up, you need to trace the leak. The most common place for the systems to leak besides the gas cap is at the service port under the hood, the hoses at the purge solenoid, and the hoses around the fuel tank. Check all your EVAP hoses from under the hood , all the way back to the gas tank. You can repair a split hose easily. Buy some 14.5mm EVAP hose at the auto parts store. Just cut the split or cracked section out and attach the new hose. I can only say that u must fix the code issue and light to pass state emission test, if u reset the light they will know, the system will tell the tester that the system is not ready, this will cause a fail.
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