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Troybilt
Rear-Tine Tiller

Model # 12090 Official Troybilt tiller

Here are the diagrams and repair parts for Official Troybilt 12090 tiller, as well as links to manuals and error code tables, if available.

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Owner’s manual

Model diagram and schematic

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ALL PARTS
Showing 10 of 311 parts  |
Screw 9552
Screw

Part #9552

Replaced by #710-0599

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Manufacturer substitution
This part replaces 9552. Substitute parts can look different from the original.
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This item is not returnable
$4.91 | 
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Screw 1100779
#11

Dozer/snow blade attachment diagram

Screw

Part #1100779

Replaced by #710-3180

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Manufacturer substitution
This part replaces 1100779. Substitute parts can look different from the original.
This item is not returnable
$6.93 | 
13% OFF Phone Price : $7.93
In Stock
V-belt 9245
#24

Belt drive system, engines, wheels diagram

V-belt

Part #9245

Replaced by #GW-9245

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Manufacturer substitution
This part replaces 9245. Substitute parts can look different from the original.
This item is not returnable

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$25.64 | 
19% OFF Phone Price : $31.64
In Stock
Scr-hh 3 8-2 1100011
#22

Belt drive system, engines, wheels diagram

Scr-hh 3 8-2

Part #1100011

Replaced by #710-0459A

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Manufacturer substitution
This part replaces 1100011. Substitute parts can look different from the original.
This item is not returnable
$10.29
In Stock
Screw 9672
#31

Power unit transmission assemblies diagram

Screw

Part #9672

Replaced by #710-04354

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Manufacturer substitution
This part replaces 9672. Substitute parts can look different from the original.
This item is not returnable
$5.94 | 
14% OFF Phone Price : $6.94
In Stock
Hex Head Screw 90070
#18

Kickstand/tine attachment diagram

Hex head screw

Part #90070

Replaced by #710-3015

?
Manufacturer substitution
This part replaces 90070. Substitute parts can look different from the original.
This item is not returnable
$5.12 | 
16% OFF Phone Price : $6.12
In Stock
Roll Pin 9308
#16

Depth regulator and tine hood diagram

Roll pin

Part #9308

Replaced by #715-0108

?
Manufacturer substitution
This part replaces 9308. Substitute parts can look different from the original.
$8.66
In Stock
Switch Assembly 1908112
#8

Electric start system diagram

Switch assembly

Part #1908112

Replaced by #925-0267B

?
Manufacturer substitution
This part replaces 1908112. Substitute parts can look different from the original.
$36.59 | 
14% OFF Phone Price : $42.59
In Stock
Hex Jam Nut 1186233
Hex jam nut

Part #1186233

Replaced by #712-0206

?
Manufacturer substitution
This part replaces 1186233. Substitute parts can look different from the original.
This item is not returnable
$2.49 | 
29% OFF Phone Price : $3.49
In Stock
Oil Seal 85030
#43

Power unit transmission assemblies diagram

Oil seal

Part #85030

Replaced by #921-04044

?
Manufacturer substitution
This part replaces 85030. Substitute parts can look different from the original.
$13.91
In Stock

Most common symptoms to help you fix your tillers

Choose a symptom to see related tiller repairs.

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Why do my tiller's tines turn but the wheels don't?

Main causes: clutch cable problems, faulty transmission…

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Why does my tiller turn the soil poorly?

Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper de…

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Why won't my tillers wheels or tines turn?

Main causes: worn or broken drive belts, bad transmission, clutch cable problems…

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Why does my tiller's engine leak oil or gas?

Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, lea…

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Why do my tiller's wheels turn but the tines don't?

Main causes: broken shaft clevis pins, transmission failure…

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Why does my tiller's engine run roughly or misfire?

Main causes: dirty carburetor, engine needs tune up, stale gas…

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Why won't my tiller's engine start?

Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter…

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Most common repair guides to help fix your tillers

These step-by-step repair guides will help you safely fix what’s broken on your tiller.

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How to replace a tiller recoil starter

How to replace a tiller recoil starter

The recoil starter spins the engine when you pull the starter rope, and the rope retracts when released. If the recoil s…

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Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your tillers

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A guide to garden tillers

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Tiller common questions

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