Troybilt
Rear-Tine Tiller

Model #900039 Official Troybilt roto tiller horse model

Here are the diagrams and repair parts for Troybilt 900039 roto tiller horse model, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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For DIY troubleshooting advice and repair guides, visit our repair help section.

Showing 10 of 318 parts

Lawn Tractor Screw (replaces 01000628, 01000865, 1186307, 1186308, 791-180288, 791-683298, 910-0599)

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Screw

Part #9552
Replaced by #710-0599
?
Manufacturer substitution
This part replaces 9552. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
In Stock
$4.78 | 
17% OFF 
Phone Price: $5.78
Lawn Tractor Bolt (replaces 01000668, 1982728, 1983620, 43001, 715326, 910-0253, 9711, B1100046, GW-325284, GW-750A, GW-90012, GW-9711, GW-98068, GW-98-068, GW-B1100046, GW-B70235, GW-M6520008, GW-PT/01395/00, GW-PT/80153/00, GW-T70235, WD-113-207)#8

(fig. 7) bolo tine assemblies Diagram

Bolt

Part #9711
Replaced by #710-0514
?
Manufacturer substitution
This part replaces 9711. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
In Stock
$5.20 | 
16% OFF 
Phone Price: $6.20
Lawn Tractor Hex Bolt#10

(fig. 4) depth regulator & tine hood assemblies Diagram

Bolt

Part #9703
Replaced by #710-3008
?
Manufacturer substitution
This part replaces 9703. Substitute parts can look different from the original.
This item is not returnable
In Stock
$3.94 | 
20% OFF 
Phone Price: $4.94
Lawn Tractor Screw

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Bolt

Part #9751
Replaced by #710-0376
?
Manufacturer substitution
This part replaces 9751. Substitute parts can look different from the original.
This item is not returnable
In Stock
$4.99 | 
17% OFF 
Phone Price: $5.99
Washer

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Washer

Part #9904

The manufacturer no longer makes this part, and there's no substitute part

Lawn & Garden Equipment Hex Nut

#NI

All parts Diagram

Hex nut

Part #9807
Replaced by #712-0375
?
Manufacturer substitution
This part replaces 9807. Substitute parts can look different from the original.
This item is not returnable
In Stock
$3.55
Seal#4

(fig. 10) dozer/snow blade attachment Diagram

Pin

Part #1158
Replaced by #921-0175
?
Manufacturer substitution
This part replaces 1158. Substitute parts can look different from the original.
In Stock
$15.29 | 
12% OFF 
Phone Price: $17.29
Lawn & Garden Equipment Bolt#32

(fig. 3) wheel speed lever, belt drive sys., engines, wheel Diagram

Hex bolt

Part #9572
Replaced by #710-0672
?
Manufacturer substitution
This part replaces 9572. Substitute parts can look different from the original.
This item is not returnable
In Stock
$6.60 | 
13% OFF 
Phone Price: $7.60
Lawn & Garden Equipment Screw (replaces 710-0805, 9854, GW-9854)#5

(fig. 11) bumper attachment Diagram

Bolt hx here

Part #9758
Replaced by #710-0805A
?
Manufacturer substitution
This part replaces 9758. Substitute parts can look different from the original.
This item is not returnable
In Stock
$4.14
Snowblower Screw#31

(fig. 5) power unit transmission assemblies Diagram

Screw

Part #9672
Replaced by #710-04354
?
Manufacturer substitution
This part replaces 9672. Substitute parts can look different from the original.
This item is not returnable
In Stock
$5.79 | 
15% OFF 
Phone Price: $6.79

Symptoms common to all tillers

Choose a symptom to see related tiller repairs.

Main causes: broken shaft clevis pins, transmission failure
Main causes: dirty carburetor, engine needs tune up, stale gas
Main causes: leaky engine head gasket, damaged sump gasket, damaged oil drain plug seal, loose or cracked fuel line, leaky carburetor seal
Main causes: carburetor failure, bad gasoline, dirty spark plug, broken recoil starter
Main causes: damaged tines, broken clevis pins, worn drive belt, faulty transmission, clutch cable problems, improper depth-stake setting
Main causes: worn or broken drive belts, bad transmission, clutch cable problems
Main causes: clutch cable problems, faulty transmission

Repair guides common to all tillers

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

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 starter assembly is broken, follow the steps in this repair guide to replace it.

Repair difficulty
Time required
 15 minutes or less

Articles and videos common to all tillers

Use the advice and tips in these articles and videos to get the most out of your tiller.

August 30, 2022

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.

December 28, 2018

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

Find the right carburetor assembly for a Craftsman snowblower, tiller or log splitter

This chart will help you find the right carburetor for your Craftsman snowblower, tiller or log splitter.

November 1, 2015

Tiller common questions

Tiller common questions

These frequently asked questions might help you figure out what's wrong with your garden tiller.