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Propeller & Shaft Work for Sailboats
The propeller, shaft, and the bearings that support them form a system that's easy to ignore — until vibration starts or the cutlass bearing finally lets go. Most cruising sailboats need a prop and shaft inspection every haul, and the work that follows is among the more important haul-out tasks.
What needs attention
- Prop inspection: Check for damage, bent blades, pitting from electrolysis.
- Prop puller test: Verify prop can be removed if needed.
- Cutlass bearing wear: Hand-test shaft for play; replace at noticeable wear.
- Shaft alignment: Feeler gauge between coupling halves; should be uniform.
- Shaft inspection: Look for pitting, scoring, or bend.
- Stuffing box: Repack flax stuffing or service dripless seal.
- Zinc anode: Replace at every haul.
Prop options
| Type | Cost range (USD) | Notes |
|---|---|---|
| Fixed 2- or 3-blade | $400–1,200 | Lowest cost, most drag under sail |
| Folding (Flexofold, Gori) | $1,200–2,500 | Mid-range cost, low drag |
| Feathering (Max Prop, Autoprop) | $2,500–4,500 | Best performance, premium price |
Common service costs
| Service | Common range (USD) | Notes |
|---|---|---|
| Cutlass bearing replacement | $500–1,100 | Parts + labour |
| Shaft alignment | $200–500 | Yard service |
| Prop pitch adjustment | $150–400 | Prop shop work |
| Prop balance | $80–200 | Prop shop |
| Stuffing box repack | $100–250 | Materials + labour |
| Dripless seal service | $150–400 | Bellows + carbon ring |
| Zinc anode | $30–80 | Per anode |
Frequently asked questions
Shaft alignment frequency?
After engine mount work, grounding, or every 2–3 years preventatively.
Cutlass bearing replacement?
Test at haul-out; replace at noticeable play. 5–10 years typical life.
Cost?
Bearing $500–1,100. Alignment $200–500. Pitch $150–400.
Prop options?
Fixed cheap. Folding mid. Feathering premium.
Pitch adjustment?
$150–400 at prop shop.