Question about Craftsman 25cc Gas Line Trimmer

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Bought both new gas hoses for 10 year 32cc 16inch gas trimmer. model 358799240. please help to install. THANKS

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  • jcc344 Aug 22, 2010

    There are two hook ups on the primer button. Starting from the primer hooks where do we go with the gas hoses to finish.

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You need to remove the air cleaner cover first.

Then take out the air filter.

Now look at the area behind the air filter base and you will see the two fuel lines at the carb. One on the top the other on the bottom.

Remove the fuel from the trimmer by pouring it back into your gas can.

Now you can remove one of the fuel lines from the carb. Lets start with the top line. Its for fuel return to the tank.
Using a pair of angled needle nose plyers or similar tool you can grip the fuel line and give it a turn and then pull it off the carb.

Now you can reach under the fuel tank and locate the other end of this line and pull it out of the tank. There might be a round plastic washer holding the line in but most of the time its just a snug fit through the hole in the tank.

With this line removed match it to the right size line you just bought. *( many setups use different size fuel lines)

Now you need to cut one end of the new line into a V. This allows you to easily push the line through the hole in the tank.
The trick now is to have a tool that will allow you to grab the fuel line from within the tank and draw it in a few inches. Long straight needle nose or medical hemostats work well for this.

Once you have the line into the tank you can run the line back to the carb and attach. No notching needed for the carb attachments.

Now, the only difference for the other fuel line is that there is a fuel clunk *( a weighted filter) attached to the line inside the tank. You should buy a new clunk now since they tend to plug up with age. And you are doing all this line work anyways right?

Now. remove the line from the bottom of the carb and work your way back to the tank. This time you will just pull the whole line out from within the tank. This is to remove the old clunk.
With the old line out take the new line and V cut it so you can snake it into the tank. Now instead of only going in a few inches you want to pull the line up through the filler opening of the tank and cut the V notch off. Put the new clunk on. And pull the fuel line from under the tank until the clunk and about three inches of line are in the tank.

Reattached the bottom fuel line to the carb and reinstall the air filter and air cleaner cover.

Put in about half a tank of gas and check for leaks/dripping.

If she is leak free. Prime it up and start it!

Good luck and be careful!

Posted on Aug 22, 2010

  • john andrew manchook Aug 22, 2010

    The primer is hooked up inline with the return (top of carb) line. So when you replace the top fuel line. The line goes to the primer first and then on to the gas tank. This is the line that doesnt have the clunk.



    You will know if you the plumbing is right when you prime and fuel goes through the primer and you can see bubbles (or fuel once primed) coming from the unclunked line in the tank.



    You might notice if you bought one size fuel line that there are different size hose connections on the primer and carb. If you dont have a good fit be sure to go back and get more fuel line to ensure no leaks. If you have any of the old fuel line left take it with you and match it.



    Good luck and be careful!

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