Bonbo Duo/Twin Prop Tool Kit 3855516 for Volvo Penta Duoprop — Two-Piece Forged Steel Wrench Set for D/F/FH/I/IH

The Bonbo Duo/Twin Prop Tool Kit 3855516 is a two-piece propeller wrench made to install and remove Volvo Penta Duoprop (D, F, FH, I, IH series) front and rear props safely and efficiently.

This compact, forged-steel wrench set replaces OEM tool part 3856278 and is engineered for the DPS and DPS‑B drives found on many Volvo Penta installations. It combines a precise fit for the factory nut profiles with reinforced construction to resist bending during heavy use. Whether you maintain a personal boat or service multiple vessels, the Bonbo kit delivers the leverage and durability needed to handle Duoprop propellers with confidence.

How does the Bonbo 3855516 make prop removal and installation easier?

The two-piece design gives you separate tools for the front and rear propellers, so you can access the different nut locations and engage the correct flats without improvising. The wrench geometry aligns with Volvo Penta nut profiles to reduce slipping and rounding. Less time struggling with ill-fitting tools means faster, safer maintenance at the dock.

• Two-piece set for front and rear Duoprop nuts
• Designed to match Volvo Penta D, F, FH, I, IH series profiles
• Improves grip to reduce nut rounding and tool slippage
• Saves time compared with generic wrenches or pliers

What materials and construction features improve durability?

Bonbo forges the wrenches from high-strength steel and applies heat treatment to increase rigidity and yield strength. That combination minimizes bending and deformation during repeated use or when higher torque is required. The finish and machining also protect contact surfaces and provide consistent engagement over the long term.

• Forged high-strength steel body for impact resistance
• Heat-treated to reduce bending under heavy loads
• Precision-machined nut engagement surfaces for longevity
• Corrosion-resistant finish suitable for marine environments

Will this kit work as an OEM replacement for my existing tool?

This Bonbo 3855516 kit is manufactured to serve as a direct replacement for OEM part number 3856278 and is compatible with DPS and DPS‑B drive units. It is intended specifically for Volvo Penta Duoprop D, F, FH, I and IH series propellers, so verify your prop model before purchase. If the part doesn't match your application, Bonbo supports returns and warranty assistance.

• Direct replacement for OEM tool part# 3856278
• Compatible with DPS and DPS‑B drive installs
• Specifically fits D/F/FH/I/IH Duoprop propellers
• Return and 1-year replacement warranty available

How should I use and care for the Bonbo prop wrench kit?

Use the correct piece for front or rear prop nuts, apply steady controlled torque, and avoid hammering the tool to prevent damage. Clean and dry after use, and store in a dry place to slow corrosion. For best results, pair the wrench with the proper torque procedure from your Volvo Penta manual.

• Select the correct wrench piece for front or rear prop removal
• Apply steady torque—avoid striking the tool with a hammer
• Rinse and dry after saltwater exposure to prevent corrosion
• Store in a toolbox or protective case to preserve finish

Who is this for: The Bonbo Duo/Twin Prop Tool Kit 3855516 is aimed at boat owners, professional marine technicians, and yard crews who service Volvo Penta Duoprop drives. It's useful for routine maintenance, prop swaps, and emergency repairs where a precise OEM‑matching wrench improves safety and reduces repair time. Choose this kit if you need a robust, purpose-built replacement for the original 3856278 tool and want a long-lasting option that handles front and rear prop nuts without improvisation.