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Ryobi 766R (810185404) (41AD766G034) 2-Cycle Gas Trimmer

 Ryobi 766R (810185404) (41AD766G034) 2-Cycle Gas Trimmer Parts

Engine Assembly
Shaft Assembly
   Engine Assembly   

 Fig # Img Part Name Availability Price
A1Air Cleaner/Muffler Cover Assembly
Part #: 753-04511
Note: Includes 2, 36
In stock
5 available
 $22.45
Add To Cart
A2Air Cleaner Filter
Part #: 791-180350B
In stock
25+ available
 $5.81
Add To Cart
A3Carburetor Mounting Screw Assembly Obsolete - Not Available
Part #: 791-180351
Discontinued
N/A
A4Spring Wash. .32" I.D.
Part #: 936-0271
In stock
3 available
 $2.42
Add To Cart
A5Choke Lever Assembly
Part #: 753-04418
Note: Includes 6
In stock
1 available
 $5.98
Add To Cart
A6Choke Knob and Screw
Part #: 791-182202
In stock
2 available
 $8.72
Add To Cart
A7Choke Lever and Plate
Part #: 753-04419
Note: Includes 5
In stock
4 available
 $7.91
Add To Cart
A8Carburetor Assembly
Part #: 791-182875
Note: Includes 9, 21
In stock
25+ available
 $41.43
Add To Cart
A9Carburetor Gasket
Part #: 791-610675
In stock
25+ available
 $3.99
Add To Cart
A10Carb Mount Screw Obsolete - Not Available
Part #: 791-181860
Discontinued
N/A
A11Primer and Hose Assembly
Part #: 791-683974B
In stock
25+ available
 $13.34
Add To Cart
A12
Carb Mount Assembly Obsolete - Not Available
Part #: 791-180354
Discontinued
N/A
A13Reed Assembly
Part #: 791-684451
In stock
5 available
 $6.58
Add To Cart
A14
Power Shaft Assembly
Part #: 791-181866
Ships in 4 - 8 business days
 $48.67
Add To Cart
A15Crankcase Cover Gasket
Part #: 753-1208
In stock
18 available
 $9.90
Add To Cart
Fig #ImgPart NameAvailabilityPrice
A16
Crank Case Service Assembly
Part #: 753-04272
Note: Includes 10, 14, 24
Ships in 4 - 8 business days
 $78.61
Add To Cart
A17Rear Mounting Pad
Part #: 791-612134
In stock
2 available
 $6.20
Add To Cart
A18Fuel Tank w/ Cap Obsolete - Not Available
Part #: 753-04311
Note: If more than 3 - Includes 19 - 21
Discontinued
N/A
A19
Fuel Cap Assembly Obsolete - Not Available
Part #: 791-181559
Note: If more than 3 - Includes 19 - 21
Discontinued
N/A
A20Fuel Return Line
Part #: 791-181086
In stock
25+ available
 $4.10
Add To Cart
A21Fuel Line and Filter
Part #: 791-682039
In stock
25+ available
 $9.20
Add To Cart
A22Front Mounting Pad Obsolete - Not Available
Part #: 791-145308
Discontinued
N/A
A23Shroud Assembly
Part #: 791-153520
Ships in 4 - 8 business days
 $28.41
Add To Cart
Screw
Part #: 181861
Ships in 4 - 8 business days
 $15.76
Add To Cart
Shroud Screw
Part #: 791-181861
Backorder:
No ETA.
 $2.47
Add To Cart
A25Shroud Extension and Stand
Part #: 753-04611
In stock
2 available
 $19.80
Add To Cart
A26Flywheel Assembly
Part #: 753-05240
In stock
15 available
 $36.32
Add To Cart
A27Square Nut Drive
Part #: 791-610303
In stock
3 available
 $14.56
Add To Cart
A28Recoil Pulley Assembly
Part #: 753-04232
In stock
23 available
 $17.26
Add To Cart
A29Recoil Spring
Part #: 791-613102
In stock
8 available
 $14.75
Add To Cart
Fig #ImgPart NameAvailabilityPrice
A30Pulley Retainer Assembly
Part #: 791-181441
In stock
1 available
 $4.65
Add To Cart
A31Rope Guide
Part #: 611061
In stock
1 available
 $4.43
Add To Cart
A32
Switch Assembly Obsolete - Not Available
Part #: 791-181442
Note: Includes 40
Discontinued
N/A
A33Pull Handle
Part #: 631-04164B
In stock
5 available
 $3.99
Add To Cart
A34Rope
Part #: 791-613103
In stock
15 available
 $5.64
Add To Cart
A35Starter Housing Assembly
Part #: 791-181443
Note: Includes 28 - 35, 40
In stock
3 available
 $40.25
Add To Cart
A36Housing Screw
Part #: 791-181862
In stock
16 available
 $2.99
Add To Cart
A37Cover Screw
Part #: 791-181345
In stock
14 available
 $2.99
Add To Cart
A38Clutch Cover Assembly
Part #: 791-180098
In stock
7 available
 $16.74
Add To Cart
A39Upper Clamp Assembly
Part #: 791-153597
In stock
4 available
 $9.67
Add To Cart
A40Wire Lead Obsolete - Not Available
Part #: 791-180036
Discontinued
N/A
A41Module Assembly
Part #: 753-04125
In stock
8 available
 $62.16
Add To Cart
A42Spark Plug
Part #: 791-610311B
Note: Oregon 77-304-1 is a suitable replacement part.
In stock
17 available
 $7.88
Add To Cart
A43Exhaust Gasket
Part #: 753-04619
In stock
10 available
 $4.56
Add To Cart
A44Muffler Assembly
Part #: 753-05169
Note: Includes 43, 45
In stock
25+ available
 $61.63
Add To Cart
Fig #ImgPart NameAvailabilityPrice
A45Muffler Mounting Bolt Assembly
Part #: 791-147575
In stock
6 available
 $5.89
Add To Cart
A46Cylinder Assembly
Part #: 753-04814
In stock
4 available
 $45.57
Add To Cart
A47Piston and Rod Assembly
Part #: 753-04367
In stock
5 available
 $38.75
Add To Cart
A48Cylinder Gasket
Part #: 791-610674
In stock
5 available
 $3.99
Add To Cart
A49
Cylinder Bolt
Part #: 791-181870
Ships in 4 - 8 business days
 $3.42
Add To Cart
AEngine Gasket Kit
Part #: 753-04134
In stock
6 available
 $7.60
Add To Cart
AO.E.M. Carburetor Repair Kit (Walbro)
Part #: 791-180602
In stock
4 available
 $41.80
Add To Cart
AO.E.M. Carburetor Repair Kit (Zama)
Part #: 791-180090
In stock
10 available
 $33.29
Add To Cart
AGasket-Diaphragm Repair Kit (Walbro)
Part #: 791-181069
In stock
3 available
 $23.21
Add To Cart
AGasket-Diaphragm Repair Kit
Part #: 791-180091
In stock
15 available
 $19.13
Add To Cart
APiston Ring
Part #: 791-180530
In stock
4 available
 $10.29
Add To Cart
A
Short Block Assembly
Part #: 791-181863
Note: Includes 10, 14, 16, 24, 42, 46 - 49
Ships in 4 - 8 business days
 $114.83
Add To Cart
AStarter Housing Screw Set
Part #: 791-181501
In stock
2 available
 $6.20
Add To Cart

Enter your engine's type number in this search field to show the parts that match your engine.

Your engine's type number is the second part of the model number stamped on your Briggs & Stratton engine (see picture).

Trimmer Parts

Repair Articles

How to Replace the Air Filter on an Echo Trimmer (Model SRM-225)
How to Replace the Air Filter on an Echo Trimmer (Model SRM-225)

Air filter filthy? Simple instructions show you how to remove and install the air filter on an Echo trimmer model SRM-225.
How to Replace the Air Cleaner Case on an Echo Trimmer (Model SRM-225)
How to Replace the Air Cleaner Case on an Echo Trimmer (Model SRM-225)

Replace your case: Quick guide to removing and installing the air cleaner case on an Echo trimmer model SRM-225.
How to Replace the Primer Bulb on an Echo Trimmer (Model SRM-225)
How to Replace the Primer Bulb on an Echo Trimmer (Model SRM-225)

Primer bulb past its prime? Follow these simple steps to remove and replace the primer bulb on your Echo string trimmer.
How to Install a Tune-Up Kit on an Echo Trimmer (Model SRM-225)
How to Install a Tune-Up Kit on an Echo Trimmer (Model SRM-225)

Tune-up your trimmer: This article shows you how to replace the air filter, fuel filter, and spark plug on an Echo trimmer model SRM-225.
Discussion
Discussion for the Ryobi 766R (810185404) (41AD766G034) 2-Cycle Gas Trimmer

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bullet
Question: 766r Ryobi 2-cycle Trimmer

bullet

I recently rebuilt my 766r. New gaskets, plug, carb diaphragms, etc. Cranked it up and it ran great. Now every time I crank it, it runs differently. One day, it will idle fine with the choke fully open and run smoothly. the next day it will only idle with the choke in the half open mode. It's got me baffled. I have tried adjusting the idle jet and idle screw-works one day - the next its back to square one! Any one got any ideas?
WJA
Reply: 766r Ryobi 2-cycle Trimmer

WJA

Hello bullet,

Sounds like you are having a great time with your trimmer. We have an article and video on How to Diagnose Two Cycle/Two Stroke Engines. Look this over and hopefully it will give you some ideas on how to get your trimmer running correctly.

-WJA
jamnw
Question: No Start

jamnw

Carb or coil? I put my trimmer up empty, but now it won't start. Tried new spark plug. Tried spraying starting fluid to see if I could get a hit, but nothing. Would you suspect the coil or the carb?
Rik1t2
Question: Fuel Line Nipples

Rik1t2

can you purchase the fuel line nipples needed to mount primer fuel line to the tank?
how to install the recoil spring 791-613102 in a 41CD766G034 which is different installation from others Ryoby.
Hey Guys I am replacing my Gearbox Assembly on my Ryobi 766R. With part number 791-180549. The GA (Gearbox Assembly) is slightly different but I was able to get it on. The only problem that I seem to be having is ether my Flexible Drive Shaft is too short (end maybe worn) or the new GA will not let the shaft of the trimmer to go far enough into the GA because when I start the trimmer the motor runs but the head dose not turn. Any help would be great.
Omar
Question: Missing Fuel Line Part

Omar

I have a Ryobi 766r trimmer/hedger. There are two fuel lines that enter/leave the fuel tank, and these go through a piece of black rubber. I can easily locate the fuel lines and primer bulb at this web site, but I can not locate the black piece of rubber. Help.
Brian
Question: Brush Blade

Brian

I've got a Ryobi 766r. I need to cut some heavy brush. In the old literature I see a brush blade, part #145873. I can't seem to find it. Is there a newer part number or a different one?
g march
Question: 766r What Cc ???

g march

What cc is the 766r 2cycle gas trimmer? Thanks
tom
Reply: 766r What Cc ???

tom

31cc
GW Bandy
Question: Fuel Line Routing

GW Bandy

I would appreciate a drawing of the routing of the fuel lines to the carburetor for my 766r 2-cycle gas trimer.

Thanks for your assistance.
GW Bandy
Mark
Reply: Fuel Line Routing

Mark

Hello,

Below you find the link to a diagram showing the fuel line routing common on Ryobi trimmers...

http://www.ereplacementparts.com/images/fuel_line_diagram.jpg

I hope this helps with your repair!

-Mark
How do I remove the trimmer head assembly? I would like to replace it with a Pivotrim head.
Zack
Question: Fuel Line

Zack

I am looking for the original fuel line for the Ryobi 766R (810185404) (41AD766G034) 2-Cycle Gas Trimmer.
Mark
Reply: Fuel Line

Mark

Hi Zack,

The feed line is part #791-682039 and the vent line is part #791-181086. Both parts are available from http://www.ereplacementparts.com.

Good luck with your repair!

-Mark

Randy
Question: Fuel Lines

Randy

I replaced the fuel lines when they started cracking. I think I attached all three line to the right places but the trimmer is hard to start and stalls when I accelerate. Is there something I did wrong? Or does the carburetor need adjusting?
Mark
Reply: Fuel Lines

Mark

Hi Randy,

It sounds to me like the carburetor is plugged. The carburetor can become clogged by dirt or other debris. With your trimmer the carb was likely plugged with pieces of the deteriorating fuel line. If fuel is left sitting in an unused trimmer for more than a couple of months the fuel will begin to breakdown and go bad. As the fuel breaks down it will start to become gel like as well as begin to coat the internal parts of the carburetor with a varnish. The gel and varnish will plug the carburetor so that fuel can no longer flow through it. To get your trimmer running again you will need to either rebuild or replace the carburetor. When you replace the carburetor it is always a good idea to also replace the air and fuel filters. This helps ensure that more debris won't clog the new carburetor.

There is not a carb kit available for the carburetor on your trimmer so it will need to be replaced. The new carburetor is part #791-182062 and is available from http://www.ereplacementparts.com

I hope this helps with your repair!

-Mark
Mike b
Question: Plug

Mike b

What type spark plug does it take and what is the gap setting?
Mark
Reply: Plug

Mark

The spark plug is part #791-610311B and is available from http://www.ereplacementparts.com. It will come to you pre-gapped and ready to install. Hope this helps with your repair! -Mark
Accessories
Accessories for the 766R

Mix Oils:
See more mix oils 
T-00745
2-Stroke Oil w/ Stabilizer 50:1 Ratio 2.6 fl.oz
$3.99

6450001
Power Blend Ultimate 2-Stroke Oil 2.6 oz.
$2.99

6450025
Power Blend Ultimate 2-Stroke Oil 6.4 oz.
$3.99

fancyboxy