How much does it cost to repair a hydrostatic transmission on a lawn mower?
Hydrostatic transmission repairs are typically a riding-mower cost category; Craftsman walk-behind mower model 917387460 normally does not use a hydrostatic transmission. If you’re pricing a hydrostatic repair on a riding mower, plan on hundreds to a few thousand dollars depending on whether it’s a linkage/service issue or a full transmission replacement; confirm your drive type in the 917387460 owner's manual.
Typical cost ranges (what you’ll usually see)
Hydrostatic costs vary most by whether you can service the system or must replace the transaxle.
- Minor diagnosis/adjustment (linkage, belt, cable, idler): often $100 to $400
- Hydrostatic drive service (fluid/filter where serviceable): often $200 to $600
- Major repair or replacement (hydro unit or transaxle): often $800 to $2,500
- DIY vs. pro labor: labor is commonly the biggest swing in total cost
Quick check: is it really hydrostatic?
Use these cues to identify the drive system before you price parts or labor.
- Hydrostatic: usually a forward/reverse pedal or lever with smooth speed changes (no shifting)
- Friction-disc or belt drive: speed changes feel more “stepped,” and belts/idlers are common wear items
- Walk-behind self-propelled: typically uses a belt and transmission/gearcase, not a hydrostatic transaxle
| Drive type | Common symptom | Most common fix |
|---|---|---|
| Hydrostatic (riding) | Won’t move, weak drive | Linkage adjustment, purge air, or replace unit |
| Belt/friction (riding) | Slips, surges | Belt, idler, friction wheel |
| Self-propelled (walk-behind) | Won’t pull itself | Belt/cable/gearcase service |
Why it matters
Hydrostatic replacements can cost more than other drive repairs, so confirming the drive type first prevents buying the wrong parts and helps you decide whether repair or replacement makes better sense.
Related DIY help
If your mower issue is “won’t move” rather than a confirmed hydrostatic failure, use lawn mower wont move troubleshooting video motion drive failure to narrow it down before ordering parts.
Last updated: January 2026
Should I use 87 or 91 gas for lawn mower?
For the Craftsman walk-behind mower model 917387460, we recommend using regular unleaded 87 octane in normal conditions. Higher octane (like 91) does not add power in small mower engines; the bigger priority is using fresh, clean fuel and the correct oil level per the 917387460 owner's manual.
What to use (and what to avoid)
- Use 87 octane regular unleaded gasoline.
- Use fresh fuel (ideally less than 30 days old) to prevent hard starting and rough running.
- Avoid old or contaminated gas; stale fuel is a common cause of “won’t start.”
- Avoid overfilling; leave a little space in the tank for expansion.
- Keep the cap area clean so dirt does not fall into the tank when refueling.
Quick comparison: 87 vs 91 octane
| Fuel choice | Best for | What you will notice |
|---|---|---|
| 87 octane (regular) | Everyday mowing | Normal starting and performance |
| 91 octane (premium) | Not required for this mower | Typically no performance benefit |
If the mower is hard to start after refueling
The manual troubleshooting guidance points to fuel quality and basic ignition items. Check these in order:
- Confirm you actually have fuel in the tank (sounds obvious, but it is common).
- Drain and replace stale fuel if the mower sat for weeks or months.
- Check the air filter for heavy dirt buildup.
- Make sure the spark plug wire is firmly connected.
- If you recently hit something, inspect the blade and blade mounting; a loose blade or damaged adapter can cause problems (see lawn mower blade adapter 532418373 if you need the correct replacement part).
Why it matters
Using the right fuel helps prevent carburetor varnish, starting problems, and poor engine performance. On model 917387460, fuel freshness matters more than paying for higher octane.
Last updated: January 2026
What model number is a Craftsman 6.75 lawn mower?
Craftsman “6.75” is an engine rating used on many walk-behind mowers, so the correct model number depends on the exact mower you own. For the Craftsman mower on this page, the model number is 917.387460 (also written as 917387460); confirm it on the rear housing decal and in the 917387460 owner's manual.
How to find the correct model number on your mower
- Look for the model and serial number decal on the rear of the mower housing.
- Write the model number exactly as shown (with or without the dot).
- Use the serial number when ordering parts if your mower has multiple production versions.
- Match the model number to the parts list and diagrams before buying a blade, cable, or hardware.
Common “6.75” model-number examples (what to expect)
Many Craftsman 6.75-hp class mowers use model numbers in the 917.xxxxxx family, but the last digits vary by deck style, drive system, and features.
| What you see on the mower | What it usually means | What to use for parts |
|---|---|---|
| “6.75” on the engine shroud | Engine power class | Use the mower’s model number decal |
| “917.387460” on the deck decal | Mower model number | Use 917387460 parts |
| Engine model number (separate label) | Engine identification | Use for engine-specific parts only |
Why it matters
Parts like the blade, blade adapter, and zone control cable are model-specific. Using the correct mower model number helps ensure the deck parts, fasteners, and safety controls fit and work correctly.
Example part that depends on the mower model
If you are shopping for a replacement blade for this mower, match it to the model-specific listing such as the lawn mower blade 532406713.
Last updated: January 2026





