19012474-1-M-Oregon-77-305-1-Resistor Plug

( Grid squares measure 1x1 inch )

19012474-1-S-Oregon-77-305-1-Resistor Plug

19012474-2-S-Oregon-77-305-1-Resistor Plug

19012474-3-S-Oregon-77-305-1-Resistor Plug

Resistor Plug 77-305-1

Manufactured by:: Oregon
ERP Number:: ERP19012474
Part Number:: 77-305-1

Works with your model 143006202!

$6.55

★★★★★

8 Reviews

Delivers in 3-5 Business Days!

Easy

15 - 30 mins

(3 rated repairs) ?

Works with your model 143006202!

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Description Troubleshooting Reviews Questions & Answers Repair Instructions Model Cross Reference

Product Description

This plug is an OEM direct from Craftsman for lawn mowers, tillers, lawn tractors, and chippers/shredders. This plug produces the flare that starts up the fuel in the engine. You will need a deep socket and a wrench to replace this part. This plug is made of plastic and metal. This part is sold individually.

Troubleshooting

This part works with the following brands:

Craftsman

This part works with the following products:

Engine
Lawn Mower
Lawn Tractor

Part# 77-305-1 replaces these:

77-305-1, RJ19LM,

★

Customer Part Reviews

4.5

Average Rating (out of 5):

★★★★★

(8 Reviews)

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★★★★★

The parts fit ok.Engine runs fine

Everything works the way it should. Thank you.

Guest - September 24, 2019

Verified Purchase

★★★★★

standard spark plug

Worked as expected

Guest - May 25, 2020

Verified Purchase

★★★★★

Easy repair

Great service and parts right on. Thanks!

Daniel - September 1, 2021

Verified Purchase

★★★★★

Great part

This worked great and the lawnmower runs great.

Guest - September 17, 2022

Verified Purchase

★★★★★

lawnmower parts review

The parts were received promptly and they were correct ones, my lawnmower is running better.

Guest - May 21, 2020

Verified Purchase

★★★★★

No pregap?? but exact fit and works fine.

Not sure if this spark plug comes pre gapped but mine apparently was not. When I opened the box I noticed that there was no gap between the electrodes. After seting the gap, the part fits perfectly and my mower started on the first pull.

Guest - October 23, 2020

Verified Purchase

★★★★★

Snow blower spark plug

Received quickly and in good shape. Works

Guest - December 27, 2020

Verified Purchase

★★★★★

Good backup

Didn't use it yet, keeping it as a backup. Did test start with it and it worked great.

Guest - April 6, 2021

Verified Purchase

Questions & Answers

Ask our Team

We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.

Does this fit my product?

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My mower (2020 purchase) won't start. It has been recommended that I get a new spark plug. Your diagrams don't show the # of the plug needed or placement in the machine. I've gotten a new air filter.

Betty For model number 20334 - March 25, 2022

Hello Betty, thank you for writing. Yes, the Plug number you need that is is compatible with your model is 77-305-1. If you need help placing an order, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you.

eReplacementParts Team

March 25, 2022

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Customer Repair Instructions

All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.

Easy

15 - 30 mins

(3 rated repairs) ?

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Rebuilding mower

James from Waverly, Ohio

2 of 2 people found this instruction helpful.

Difficulty Level:: Easy
Total Repair Time:: 30 - 60 mins
Tools:: Nutdriver, Screw drivers, Socket set
Parts Used:: 77-305-1, 144-6431, 137-4837, 131-4547-03

1. Replaced Spark plug
2. Removed and replaced blade.
3. Removed rear wheels and replaced.
4. Removed front wheels and replaced gear guards.
5. Removed damaged trailing guard and replaced.

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The primer bulb had dry rotted.

Steve from Rising Sun, Maryland

0 of 1 people found this instruction helpful.

Difficulty Level:: Easy
Total Repair Time:: 15 - 30 mins
Tools:: Pliers, Screw drivers, Socket set
Parts Used:: 77-305-1, 595079601

Simply replaced the primer bulb and spark plug to be ready for next year.

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routine maintainance

daniel from salinas, California

0 of 1 people found this instruction helpful.

Difficulty Level:: Easy
Total Repair Time:: 15 - 30 mins
Tools:: Screw drivers, Socket set
Parts Used:: 77-305-1, 532189028, BS-491588S

routine service. replace spark and air filter,replace worn out blade,replace air filter,change engine oil.

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Model Cross Reference

This part works with the following models:

ERP Number: ERP19012474
Manufacturer Part Number: 77-305-1

Brand	Model Number	Description
Craftsman	143001101	Engine - Engine
Craftsman	143001103	Engine - Engine
Craftsman	143001105	Engine - 4-Cycle Engine
Craftsman	143003500	Engine - Engine
Craftsman	143003502	Engine - Engine
Craftsman	143003504	Engine - Engine
Craftsman	143003506	Engine - Engine
Craftsman	143003508	Engine - Engine
Craftsman	143003800	Engine - Craftsman Engine
Craftsman	143003802	Engine - Engine
Craftsman	143003804	Engine - Engine
Craftsman	143004000	Engine - Engine
Craftsman	143004002	Engine - Engine
Craftsman	143004004	Engine - Engine
Craftsman	143004006	Engine - Engine
Craftsman	143004008	Engine - Engine
Craftsman	143004010	Engine - Engine
Craftsman	143004012	Engine - Engine
Craftsman	143004014	Engine - Engine
Craftsman	143004016	Engine - Engine
Craftsman	143004018	Engine - Engine
Craftsman	143004500	Engine - Engine
Craftsman	143004502	Engine - Engine
Craftsman	143004504	Engine - Engine
Craftsman	143004506	Engine - Engine
Craftsman	143005001	Engine - Engine
Craftsman	143005003	Engine - Engine
Craftsman	143005004	Engine - Engine
Craftsman	143005006	Engine - Engine
Craftsman	143005008	Engine - Engine