Hihitomorrow Duo Prop Tool Kit 3855516 — Volvo Penta Duoprop Propeller Wrenches, Heat-Treated Carbon Steel

The Hihitomorrow Duo Prop Tool Kit 3855516 is a two-piece propeller installation and removal wrench set made to fit Volvo Penta DPS-A, DPS-B and DP-SM duoprops, letting you remove and install front and rear D-series and F/I-series propellers with less effort.

If you maintain a boat powered by Volvo Penta drives (D, F, FH, I, IH series) this pair of prop wrenches is engineered to match the splines and mounting geometry found on DPS duoprops. Built from heat-treated carbon steel and finished for corrosion resistance, the kit replaces part number 3855516 and is supplied as two separate tools sized for the front and rear prop. The design concentrates leverage at the right points so one person can handle prop changes on the dock or in the yard more efficiently and with less risk of damaging the prop or drive.

How does this kit make prop removal and installation easier?

The wrenches are shaped to engage the splines and hub surfaces used on Volvo Penta Duo props, reducing slippage and the need for improvised tools. Their leverage geometry helps break seized nuts and cinch prop fittings to the correct seating without excess force. This saves time and lowers the chance of rounding fasteners or marring prop surfaces.

• Two dedicated tools sized for front and rear props to match factory fit.
• Positive spline engagement reduces slippage during turning.
• Leverage-focused design decreases effort needed to break tight fittings.
• Replaces Volvo Penta part 3855516 for like-for-like service work.

What drives the durability and corrosion resistance of these tools?

The kit is manufactured from heavy-duty carbon steel that is heat-treated for strength, then finished to resist rust. That combination provides the torque capacity needed for marine service while better resisting the corrosive environment around saltwater. Proper care—cleaning and light coating after use—extends service life further.

• Heat-treated carbon steel core for high tensile strength.
• Protective finish to limit surface corrosion in marine settings.
• Solid construction reduces risk of bending under load.
• Durable edges retain correct fit to splines over repeated use.

Which Volvo Penta models and prop types are compatible?

This prop wrench kit is intended for DPS drive duo propellers and fits DPS-A, DPS-B and DP-SM applications. It works with D aluminum Duo props that use straight splines as well as many F, FH, I and IH series propellers. Always verify spline count and hub type before purchase to ensure full compatibility.

• Designed for DPS-A, DPS-B and DP-SM duoprop drives.
• Compatible with D-series aluminum Duo props having straight splines.
• Also fits many F, FH, I and IH series prop installations.
• Direct replacement for Volvo Penta OEM part 3855516.

What comes in the package and how is it used?

The kit ships as a two-piece set—one tool for the front prop and one for the rear—so you have the correct profile for each end of the duoprop assembly. Use standard workshop torque procedures and an appropriate breaker bar or handle through the wrench opening. Avoid impact tools unless specified; use steady torque and check manufacturer torque specs for final tightening.

• Two-piece prop tool set: front and rear specific wrenches included.
• Fits directly over prop hub splines for a secure turn when removing or installing.
• Use with a compatible handle or breaker bar to apply controlled torque.
• Supplied as a direct replacement for Volvo Penta 3855516.

Who is this for: Boat owners, marine technicians and DIYers who service Volvo Penta DPS duoprops and need an OEM-fit tool to remove and install D, F, FH, I and IH series props. It’s suited to routine maintenance, seasonal prop swaps and on-deck repairs where secure spline engagement and reliable leverage reduce the risk of damage to the prop or drive. If you require a one-to-one replacement for Volvo Penta part 3855516 with durable steel construction designed for marine use, this two-piece Hihitomorrow kit is built for that role.