Boat Propeller Repair Cost: What to Expect
Most propeller repairs fall between $50 and $400 depending on the type and severity of the damage, making repair significantly cheaper than buying a new prop in the majority of cases. A bent blade or minor cupping can often be fixed for under $150, while a cracked hub or severe pitch distortion sits at the higher end of that range. Knowing what drives the cost helps you decide quickly whether to repair, replace, or call a mobile marine mechanic to assess the damage on the spot. Learn more about Boat Propeller Repair.
Why Repair Costs Vary So Much From Prop to Prop
The price you pay depends on three things: the type of damage, the material your propeller is made from, and the number of blades involved. Aluminum props are cheaper to repair than stainless steel because aluminum is softer and easier to reshape, but stainless holds up better over time. A single bent blade on a three-blade aluminum prop is a straightforward job, while a four-blade stainless prop with cupping on multiple blades requires more labor and specialized equipment. The pitch and diameter of the prop also matter, since larger props take longer to true up correctly.
Typical Repair Costs by Damage Type
These ranges reflect what most boat owners pay for common propeller damage at a reputable repair shop or through a mobile mechanic.
Bent Blade:
Usually $50 to $150 for aluminum, $100 to $250 for stainless. A single bent blade is the most common repair and the fastest to complete when the damage is not too severe.
Cupping Correction:
Expect $75 to $175 depending on how many blades need work. Cupping affects performance and fuel economy, so correcting it is almost always worth the cost.
Crack Repair:
Minor cracks run $100 to $200, but deep or structural cracks can push past $300. A mechanic needs to assess whether welding will hold or whether replacement is safer.
Hub Replacement:
Hub kits typically cost $30 to $80 in parts, plus one to two hours of labor. Total cost usually lands between $80 and $200 and is one of the most cost-effective repairs available.
Pitch and Balance Correction:
Rebalancing and re-pitching after impact damage runs $100 to $250. This step is critical because an out-of-pitch prop strains your engine and burns extra fuel on every trip.
Full Reconditioning:
When a prop has multiple issues, a full recondition covering straightening, cupping, pitch correction, and balance costs $200 to $400 and often extends prop life by years.
When Repair Makes More Sense Than Buying New
A new mid-grade aluminum prop for a typical outboard runs $80 to $200, while a quality stainless replacement can cost $300 to $800 or more. That means repair is almost always the right call for stainless props with repairable damage, since you are preserving a more expensive component. For aluminum props, the math is closer, but repair still wins when the damage is limited to one or two blades and the hub is intact.
The clearest sign that replacement beats repair is when the prop has multiple cracks near the hub, when a blade has broken off entirely, or when the prop has already been repaired several times and the metal has fatigued. A mobile marine mechanic can inspect the prop in the water or at the dock and give you an honest read on whether the repair will hold up under real running conditions.
- Repair if: damage is limited to one or two blades, hub is solid, prop is stainless steel
- Replace if: blades are broken off, cracks run to the hub, or the prop has been repaired repeatedly
- Always re-pitch and balance after any blade repair to protect your engine
How a Mobile Mechanic Changes the Cost Equation
Taking a damaged prop off the boat, driving it to a shop, and waiting days for the repair adds time and hassle that most boaters underestimate. A mobile marine mechanic can remove the prop at your dock, assess the damage on the spot, and in many cases handle hub replacements and minor straightening the same day. For more involved repairs requiring a prop shop's hydraulic press, the mechanic coordinates the work and reinstalls the prop when it returns, so you are not left guessing whether it was mounted correctly. That convenience is worth factoring into the total cost, especially during peak boating season when every weekend counts.
Related Guides
Next: Signs of a Bad Boat Propeller: How to Tell If Your Prop Needs Repair
Frequently Asked Questions
Can a badly bent propeller blade be straightened back to original spec?
In many cases yes, but it depends on how far the blade was displaced and whether the metal cracked during the bend. A prop shop uses a hydraulic press and pitch gauges to restore the blade, then rebalances the whole prop. If the blade bent sharply or shows cracking, replacement is usually the safer choice.
How do I know if my prop needs repair versus just cleaning?
Run your hand carefully along each blade edge and look for nicks, dings, rolled edges, or any visible bending away from the original plane. Vibration at cruising speed, a drop in top-end speed, or increased fuel consumption are the most common performance signs that something is off. A mechanic can confirm whether the issue is the prop or something else in the drive system.
Does prop damage affect my engine?
Yes, and more quickly than most people expect. An out-of-balance or out-of-pitch prop creates vibration that stresses the crankshaft, bearings, and gear case over time. Running on a damaged prop even for a few hours can turn a $150 prop repair into a much larger engine repair bill.
Is it worth repairing a cheap aluminum prop?
If the repair cost approaches or exceeds the price of a new prop, replacement makes more sense. For minor damage like a small ding or a single bent blade tip, repair is still the faster and cheaper option even on an entry-level aluminum prop.
How long does a propeller repair typically take?
Hub replacements and minor straightening can often be done the same day, especially through a mobile mechanic. More involved work sent to a prop shop usually takes two to five business days. Asking about turnaround time upfront helps you plan around your boating schedule.
Will a repaired prop perform as well as a new one?
A properly repaired and rebalanced prop should perform very close to its original spec. The key is making sure pitch is corrected across all blades and the prop is balanced before it goes back on the water. Skipping the balance step is the most common reason a repaired prop still vibrates.