This part is an OEM from Craftsman for use with Craftsman Trimmers. The gearbox contains the gears that turn the line spool for cutting. The most common reasons for replacing the gearbox is if the tri...
1) While still attached to the fuel tank, I first sized up the old fuel lines with the newer fuel lines. 2) With a pair of needle nose players, I then removed the old dry rotted fuel ?? lines, from the fuel tank. 3) I cleaned the fuel tank and around the carburetor area, to insure that there was no debris, that could possibly fall into the path of the new fuel lines installation. 4) I then installed the smaller one of the fuel lines, so that it would be out of the way, of the larger fuel line. I Pulled the fuel line through the smaller hole in the fuel tank, with needle nose players. I pulled the smaller fuel line out through the fuel tank filler hole, attached the fuel filter to the smaller fuel line. I Made sure that the fuel filter was extended to the furthest end of the fuel tank bottom. Six inches in all. I then attached the smaller fuel line to the carburetor. 5) I Installed the larger fuel line, followed the same procedures as the smaller fuel line. 6) Both fuel lines where cut on an angle for easy installation. No lubricant was necessary. 7) I filled up the fuel tank with fresh fuel and oil, new air filter and spark plug. It started on the first pull. Amazing.
To start, remove the plastic carburetor grill. DO NOT remove the carburetor. The fuel line has to be sliced down to fit through the tank hole and get it in far enough up into the tank to grab with needle nose pliers.( need long needle nose pliers which I didn't have) I placed about six inches of the plastic tubing in the jaws of vice so that half of the tube was squeezed in the vice jaws. I then used a razor blade to shave off the exposed tube. I slipped the shaved end of the tube up through the tank hole far enough to grab with long tweezers and pulled it up to where I could grab it in the tank with needle nose pliers. I put light lube oil on the remaining tubing and pulled it through. It takes a steady firm pull to pull it in. Install the filter and pull the tube back down into the tank. I also used a small diameter drill bit and with my fingers slightly reamed the tube ends to ease the tube over the filter and carburetor nipples. To prime the engine, spray starting fluid into the carburetor and start. Repeat until the engine will run on fuel. It took me hours to figure this out, but will take less than an hour with this method.
Seven screw, three case cover, two air cleaner, two carb mounting, pulled carb, drained tank, pulled old fuel line, treaded new one in, wire to thread, thread to angle cut fuel line. Reassemble, test, sharpen chain, retest…not exactly a doityourselfer, graduate degree in mechanical/industrial engineering and former medium/heavy mechanical. Get fuel line on carb prior to reassembly, line may need some stretching with a tapered punch.
