16 Inch Gas Chain Saw MCC1635AK

Experienced gardeners share their insights in answering this question :
The fuel hose from the tank with the filter on the end goes to the fuel inlet on the carb ( conection nearest to the pump cover held with a single screw ) then take a pipe from the other carb conection to the short conection on the back of the primer ( suction side ) now take a pipe from the longer conection on the primer ( pressure side ) back to the tank, the primer pulls fuel from the carb and dumps it back to the tank

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

The (clear) fuel intake line runs from the top of the carburetor (straight nipple) and goes to the short post on the back of the primer bulb. The return line (blue) comes from the long post on the back of the primer bulb and goes into the bottom of the fuel tank.
The primer bulb is generally placed close to the engine, and usually downstream of any fuel filters or water-separtors. Many new engines are delivered without a fuel disconnect fitting, and instead just provide a short stub of fuel line from the engine cowling.
Most chainsaws have two fuel lines – one that feeds fuel into the carburetor and a return tube that allows unused fuel to flow back into the chainsaw gas tank.
A typical fuel system

A single fuel pipe runs from the tank, under the floor of the car to a mechanical pump on the engine. The pump delivers fuel to the carburettor. Whenever you check fuel pipes, disconnect the battery to prevent stray sparks igniting petrol or petrol vapour.

The (clear) main fuel line with the filter (filter inside the fuel tank) goes to the bottom of the carburetor (or the elbow shaped nipple). The (clear) fuel intake line runs from the top of the carburetor (straight nipple) and goes to the short post on the back of the primer bulb.
A manual fuel primer injects vaporized fuel directly into one or more of the engine`s cylinders to aid in starting.
Prime the fuel system by turning the ignition on (Run position) for 30 seconds, but do not start the engine. This allows the pump to prime the system. Turn the ignition off, and then crank it for 15 seconds. If it does not start, repeat the first task and this one until it starts (cycle the key).

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Troybilt trimmer primer bulb collapses. it will start occasionally but will only run a few minutes.i have replaced the primer bulb and gas lines and still have the same problems.
ANSWER : It should have a small vent in the fule tank cap if its blocked the primer bulb will be sucked in as the fule pump can **** any fule from the tank
check the tank cap first,,,,,

Looses prime i have replaced all the hoses and primer button and replaced the diaphrahms in the carburator. but i still hear air when i pump the primer bulb. any other ideas ??
ANSWER : Have you replaced the primer bulb ‘base’.?

I have a Craftsman Gold 6.0 mulching mower with a B&S engine on it that has been idle for about 10 years. It was only lightly used before that and I ran the gas tank dry before putting it away. Today I put gas in the tank pressed the primer bulb 3X and pulled the cord a few times without it starting. I noticed gas dribbling out of the little hole in the center of the primer bulb. It continuously drips and the gas is puddling on the top deck of the mower. Is this likely a problem with the primer bulb or something else? Thanks.
ANSWER : Sounds like the primer bulb dry rotted from sitting &/or the float is stuck in carb. If gas is indeed leaking from bulb. It will need to be replaced. While it is apart, clean carb inside & out with spray carb cleaner.

Why won’t the Prime bulb fill on blower and how to fix?

This is only the second time I have used my Toro lawnmower and it won’t start. I have pulled and pulled, can’t find a primer button, checked the gas and oil (everything is fine) but it still won’t work.
ANSWER : Only the second use?? Take it back where you bought it and ask them to demonstrate for you.

What else should i try
ANSWER : Make sure lines are connected correctly. On the back of primer it is stamped In & out

Primer wont work fs45
ANSWER : Rebuild carb

Chain saw, there is a line from primer to the carb, then what? I cant tell if coming out of the carb it goes back to primer or in the fuel tank? Then should there be a line from fuel tank to the primer?
ANSWER : Similar to this, typical fuel system.

Fuel Line Replacement by SmallEng.com

The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
The pressure side of the primer returns displaced fuel to the tank as it is depressed.
Take lots of notes and a few digital photographs to help with reassembly. HTH