Gravely 988091 User Manual

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GB - 18

* CE Certiﬁed

ACCESSORIES

See your authorized Gravely dealer to add these

optional accessories.

78800200 Grass Catcher Adapter Kit (36” mower)

78800400 Grass Catcher Adapter Kit (50” mower)

78506700 High Lift Blade Kit (50")

78802900 Mulching Kit (36” mower)

78800800 Mulching Kit (50” mower)

ATTACHMENTS

See your authorized Gravely dealer to add these

attachments to your unit.

888301 36” Side Discharge *

888047 36” Mower

888010 Grass Catcher (Multi-Use)

888048 50” Mower

SERVICE PARTS

Be sure to always use genuine Gravely parts to keep

your unit running like new.

Part no. Qty Description

78801800 1 Battery

21391300 1 Paper Element - Kawasaki - 14 hp

21391200 1 Foam Precleaner - Kawasaki 14

hp

042926 1 Paper Element - Kawasaki 12.5

hp

042925 1 Foam Precleaner - Kawasaki 12.5

hp

21530000 1 Air Filter - Briggs & Stratton

040742 1 Fuel Filter - Kawasaki

21530400 1 Fuel Filter - Briggs & Stratton

21380000 1 Oil Filter - Kawasaki 14 hp

048832 1 Oil Filter - Kawasaki 12.5 hp

21530700 1 Oil Filter - Briggs & Stratton

21384700 1 Spark Plug - Kawasaki 14 hp

042914 1 Spark Plug - Kawasaki 12.5 hp

21531100 2 Spark Plug - Briggs & Stratton

Other manuals for Gravely 988091

Service Manual46 pages

Questions and Answers:

D
Dr. Ashley Schmidt DDSAug 8, 2025
How to troubleshoot a Gravely 988091 Lawn Mower when the engine will not start?
- M
  millerdonnaAug 8, 2025
  The Gravely Lawn Mower engine won't start if the speed control lever isn't in neutral and the PTO switch isn't in the Off position. Also, make sure you have enough fuel and that it's clean. If the air filter is clogged, clean or replace it. For spark plug issues or safety interlock problems, consult the Engine Manual or your Dealer.
H
hallcrystalAug 14, 2025
What to do if my Gravely Lawn Mower will not move or mow?
- E
  Emily ShepardAug 14, 2025
  If your Gravely Lawn Mower won't move or mow when the engine is running, the transmission or mower belt might be broken, worn, or off the pulleys. Check these belts for wear, damage, and correct positioning. Replace them if needed, referring to the Service and Adjustments section for guidance.
C
Chelsea HebertAug 21, 2025
Why won't my Gravely 988091 move on an incline?
- H
  Holly McintyreAug 21, 2025
  If your Gravely Lawn Mower won't move when operated on an incline, check the steering and brake linkage for any debris or damage, and repair if necessary. Also, worn or damaged traction belts could be the cause, so inspect them and replace if needed. If the transmission shaft pulley is excessively worn, it should be replaced. For adjustments, see Service and Adjustments. For pulley replacement or linkage repair, see your Dealer.

Gravely 988091 Specifications

General

Brand	Gravely
Model	988091
Category	Lawn Mower
Language	English

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