Frank & Peggy gave us his X300 when Sun South told him it would cost $700+ to replace the carburetor because it only runs evenly with the choke slightly on. He bought a Husqvarna. I installed an after-market carb from Alexander’s and it runs fine.
The Operator’s Manual in DropBox is here and the Service Manual is here.
- Hours when received – 572
- Tire Pressure – Front 14 psi, Rear 10 psi
- Specs – https://www.tractor-specs.net/john-deere/jd-x300.html
- X300 Product ID No. 1MOX300CEEM292390
- Kawasaki Engine Code FS600V-BS21-R; E/NO FS600VB30166
- John Deere Parts Catalog and exploded views here.
To level the deck set the dial at 2.75 and use the gauge. Then set scalping wheels to ¼-½ inch clearance, see pages 23-25 in the Operator’s Manual.



General Specifications | |
Model | John Deere X300 |
Length | 72 in |
Width | 38 in |
Height | 43 in |
Wheelbase | 49.4 in |
Weight (without mower deck) | 483 lbs |
Fuel tank capacity | 3.3 US gal |
Battery | 12V |
Engine Kawasaki FS600V – from here | |
Engine model | FS600V |
Fuel | Gasoline |
Power output | 18.5 HP at 3,600 rpm |
Oil type | 10W-30 |
Oil capacity | Oil Capacity |
Spark plug | NGK: BPR4ES |
Spark plug gap | 0.7-0.8 mm (0.027-0.031 in) |
Ignition coil air gap | 0.2-0.4 mm (0.008-0.011 in) |

Greasing
If not using any of the preferred greases, be sure to use a general all-purpose grease with an NLGI grade No. 2 rating. Lubricate three mower spindle grease fittings (A) with two pumps of grease at specified interval.
Leveling
Carburator view and parts
https://www.partshouse.ca/oemparts/a/kwe/620d75f5855d462f545d9ab7/carburetor
