Click to enlargeBennett 12x9 BOLT System w/Adjustable Upper Hinge
Manufacturer: Bennett MarinePart #: BOLT129ADJSKU: 80635
Item #: 80635
Category: Trim Tabs
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Description
12x9 BOLT System with Adjustable Upper Hinge Properly sized trim tabs improve the performance of your boat by adjusting the running angle of your vessel. Bennett Marine trim tabs help you get on plane faster, correct listing (roll), improve visibility, and increase overall efficiency and control.
Features: Get on plane quickly to see over the bow Increase vessel performance and efficiency Correct listing (roll) Adjust the boat’s attitude for changes in speed, sea conditions, and shifting weight Correct porpoising (rhythmic bouncing) Controls sold separately General guidelines for choosing a trim tab size: In general, the widest span tabs that will fit on the transom will be the most effective. The greater the surface area, the greater the lift.
We‘ll typically recommend a 9” chord tab, but depending on available transom space a shorter or longer chord tab, or specially shaped tabs with upfins or dropfins may be advised. As a general rule for boats with max speeds of 40MPH, choose at least one inch of trim tab span (per side) for every foot of boat length.
For example, a 22′ boat would use a 24”x9”. For speeds 40MPH and over, we’ll generally point you to one of our Performance, or Premier Line high-performance systems.
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
Specifications
| Brand | Bennett Marine |
|---|---|
| Part Number | BOLT129ADJ |
| EverTide SKU | 80635 |
Specifications are provided by the manufacturer. Confirm fitment for your application before ordering, or contact us and we'll help.
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Returns are accepted within 30 dayson items that are unused and in their original packaging. Some items may be subject to a manufacturer restocking fee. Special-order items may not be eligible — if you're unsure, ask us before ordering.
Bennett Marine productscarry the manufacturer's standard warranty. For a warranty claim or a return authorization, see our full returns policy or contact us.
Boat Outfitting — frequently asked
- What material should marine hardware be made of?
- For most exposed hardware, 316 stainless steel is the marine standard — it resists salt corrosion far better than 304 stainless or plated steel. Marine-grade aluminum, UV-stabilized nylon, and King StarBoard are also common for non-structural fittings.
- How do I know a replacement seat or hatch will fit?
- Measure the mounting pattern (bolt spacing), the cutout or base dimensions, and any post diameter or height on the part you’re replacing. Match those to the new part’s specs — outfitting parts follow common sizes but are not universal, so confirming dimensions avoids returns.
- Do I need backing plates for deck hardware?
- For anything that takes load — grab rails, cleats, ladder steps, seat pedestals — yes. A backing plate spreads the load across a larger area of the deck or transom so fasteners don’t pull through under stress.
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