Z425 Z375R Air Filter Oil Filter Tune Up Kit for John Deere Z525E Z225 Z245 Z435 Z625 Ztrak Mowers

What It Is

This tune-up kit includes an air filter, oil filter, and spark plug(s) designed for routine maintenance on select John Deere ZTrak zero-turn mowers. It replaces worn filters and plugs to restore engine performance, fuel efficiency, and reliable starting.

Fitment & Compatibility

Check your exact model and engine type before buying. This kit fits John Deere Z225, Z245, Z425, Z435, Z525E, Z625, and Z375R mowers—but only those with Kawasaki or Briggs & Stratton engines (not Kohler or Yamaha). Verify your mower’s model number and engine brand on the engine shroud or owner’s manual. The kit is aftermarket, not OEM John Deere, so expect slightly different branding but identical dimensions. Measurements: air filter is roughly 6.5” x 5” x 2”, oil filter is 2.5” diameter with 3/4-16 thread, spark plug is 14mm thread with 3/4” reach (check gap: 0.030”). If your mower uses a different plug (e.g., NGK BPR6ES), this kit won’t fit.

Key Things to Know

• Quality is solid for the price. Filters use pleated paper media comparable to OEM; spark plug is standard copper-core (not iridium). Good for seasonal use but not heavy commercial duty.
• Installation is beginner-friendly. No special tools beyond a socket wrench, oil filter wrench, and spark plug gap tool. Drain oil first, replace filter, then fill with SAE 30 or 10W-30 (not included).
• Common gotcha: The oil filter may be tighter than expected—use a strap wrench to avoid damaging the housing. Also, double-check spark plug gap before installing; pre-gapped plugs can be off by 0.005”.
• Not a full tune-up kit. It lacks fuel filter, air filter pre-cleaner, or fuel stabilizer. For a complete service, buy those separately.

Should You Buy It

Buy this if you own one of the listed ZTrak models with a Kawasaki or Briggs engine and want a budget-friendly, one-stop kit for basic annual maintenance. It’s a good value for homeowners who change oil and filters themselves. Skip it if you need OEM parts for warranty compliance, or if your mower uses a Kohler engine—fitment won’t work.