How do i replace the primer bulb on a sears model number 358.971170?

SOURCE: primer pump rotten need replacement show parts page

The hoses run through a hole into the gas tank, they are fitted with a filter inside the tank. Drain the tank, and manipulate the hose end to where you can grab it throught he filler hole, Remove the filter, run new gas lines into the tank and through the filler hole to replace the filter, reattach to the carburator. The primer bulb should have 4 small screws attaching it to the carburator. Remove the screws, place in new primer bulb, and you should be back to trimming asap.

SOURCE: Mcculloch chainsaw. Model 2116av. Primer bulb is

Hello Jeff;
Your saw is listed here:
McCulloch MTD
Chainsaws 32cc-35cc-38cc Anti-Vibe
The IPL (exploded parts list) for your saw is the only detail for fuel line routing and it is sketchy at best; components are listed but may be on different illustrations. The primer is displayed but not listed, and there is no part number. Before you get to deep please contact OrderTree.
http://www.ordertree.com/cms/parts-lookup-help/73.html


Use the IPL as a guide for disassembly/reassembly.
This is typical routing and a couple of hints.
http://www.fixya.com/support/r3706813-2_cycle_fuel_system_repair

OMs for McCulloch are tough. harder than replacing the fuel line. Have your saw within easy reach they will want the serial number and a few other things.
Operators Manuals: are much more difficult. I have dialed this number many times (Contact Us - All McCulloch Products 1 (800) 521-8559) and have yet to get a satisfactory response. Please try this! If enough of us try they will fix it! If unsuccessful with McCulloch try here:
Beg for manuals thread (ArboristSite - free to join). Please use the search function first, it has probably been asked and answered.
http://www.arboristsite.com/showthread.php?t=72322
Good luck with your project. HTH
Lou

SOURCE: Primer bulb-carb routing

It should be like this.
http://www.fixya.com/support/r3706813-2_cycle_fuel_system_repair

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou

SOURCE: I have a yard machine

Your carbs main jet is blocked. Using the primer supplements the fuel input and keeps the engine from becoming fuel starved.

You need to remove the main jet and run a strand of fine wire through the jet to clear it.

SOURCE: My Homelite Mighty Lite 26b

Homelite wants to sell you a new carburetor assembly. Your blower came equipped with a RuiXing brand carb. RuiXing does not offer any repair parts for their carbs, only replacement units.
Now for the good news....a Zama brand primer bulb fits perfectly on the RuiXing carbs. Check with your local small engine repair shop for a Zama primer bulb. The blower requires removal af the carb to get at both of the screws that hold on the bulb. It is not difficult, just one nut holds on the outer airbox cover...don't lose the little washers. Then one long stud and one short screw will take the carb off. Replace the primer bulb and reinstall everything the same way it came off.
Good luck!