This replacement part is a genuine high quality OEM primer bulb. It is specially produced for use on gas powered string trimmers. The purpose of the primer bulb is to force fuel from the fuel tank into the carburetor. Once the carburetor is full of fuel, the excess fuel will be sent back into the tank. Over time these flexible rubber parts tend to deteriorate and lose their elasticity. If the part is cracked it will need to be replaced. Please note, one primer bulb is included per order.
Troubleshooting
This part works with the following brands:
Cub Cadet
Ryobi
Troy-Bilt
Craftsman
MTD
This part works with the following products:
Trimmer
Part# 791-181701 replaces these:
791-181701,
Videos For installing this part.
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Customer Part Reviews
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3.7
Average Rating (out of 5):
★★★★★
★★★★★
(3 Reviews)
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★★★★★
★★★★★
Quick easy fix
Gas trimmer is 20 years old and replacement parts are hard to find. Ereplacement had the part I needed and provided quick delivery. Without the part I was faced with purchasing a new trimmer at a cost of $300 for a comparable unit. Saved the day as well as my wallet
Guest - April 27, 2019
Verified Purchase
★★★★★
★★★★★
excellent help
item was correct and arrived promptly, no other firm was able to help me identify the part i needed, including the actual part manufactura
Guest - June 11, 2019
Verified Purchase
★★★★★
★★★★★
Fail
I called and explained what i needed and how my priming bulb was designed. My model(2 yrs old) was not supported in your system. The rep found a part and said it should work. Its not even close. 13 dollars wasted!
Guest - April 23, 2020
Verified Purchase
Questions & Answers
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Removed four screws holding primer bulb in. Caution watch for gas seepage. Put new Bulb in place and reinstalled screws.
Removed trimmer head with adjustable wrench and a big pair of channel locks it just screws off and the new one screws right on works perfect.
Removed Carb cover, just snapped off.
Remove four screws.
Pull metal retaining cover off with primer bulb.
Remove primer bulb. Push new bulb in.
Install four screws.
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The original primer bulb had split and would not prime the trimmer
Remove the 4 bolts holding the plate the bulb comes through using a Phillips head screwdriver.
Remove plate and bulb, leaving the main assembly on the carb/motor.
Remove the bulb from the plate, then insert the new bulb through the opening on plate.
Seat plate on carb with bulb in grooves and insert the 4 bolts, tighten
... Read moresequentially in a pattern until tight.
Test primer bulb by priming the system.
If bulb is not seated it will not create a suction, loosen bolts and reseat the bulb and plate then tighten again and repeat test.
Removed the screws from the primer bulb plate, and removed the cracked primer bulb and installed the new one. Screwed on the plate with the new bulb in it.
Remove the air filter cover and removed the old filter and placed the new filter in, replaced the filter cover
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Model Cross Reference
This part works with the following models:
ERP Number: ERP9135165
Manufacturer Part Number: 791-181701
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
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_WW_1.gif "Part Location Diagram of 791-181701 MTD Primer Bulb")
_WW_1.gif "Part Location Diagram of 791-181701 MTD Primer Bulb")
