NOVINO Flo-Torq II Hub Kit 835257Q1 — Fits Mercury/Mariner & MerCruiser, restores prop coupling

NOVINO 835257Q1 Flo-Torq II Hub Kit is a direct-fit replacement hub assembly designed to restore propeller coupling, reduce vibration, and protect your Mercury/Mariner or MerCruiser drivetrain.

If your boat shows vibration, difficulty planing, or the rubber sleeve in the Flo-Torq II hub is cracked, this kit provides the components needed to repair the propeller connection on many Mercury/Mariner outboards, MerCruiser Alpha/Bravo drives, and compatible Verado engines (with 1" shafts). It replaces OEM 835257Q1 and includes the forward thrust washer, drive sleeve, aft adapter, tab washer, and prop nut so you can do an on-site swap and get back on the water quickly.

Will this hub kit fit my Mercury or MerCruiser engine?

Compatibility covers a wide range of Mercury/Mariner outboards and MerCruiser sterndrives, but some older or specific Verado V8 shafts are excluded. Check your engine model year and prop shaft diameter to confirm fit before ordering.

• Covers Mercury/Mariner 75HP (1984+) and 90–115HP (1978+), 125HP (1994+).
• Fits MerCruiser 120–260HP (selected years) and Alpha One/Bravo One drives.
• Compatible Verado 150–300 six-cylinder engines with 1" shaft only; not for Verado V8 1.25" shafts.
• Not for Mercury/Mariner 1977 and older models.

How does installing this Flo-Torq II hub kit improve boat performance?

Replacing a worn or broken hub sleeve restores propeller alignment and cushioning, which reduces vibration and drivetrain shock. That smoother connection can help protect the prop, reduce noise, and maintain efficient power transfer for better acceleration and fuel economy.

• Replaces damaged rubber sleeve that causes vibration and poor planing.
• Absorbs impact to protect propeller and gearbox components.
• Improves drivetrain efficiency for steadier RPM and potentially lower fuel use.
• Designed to match Flo-Torq II interchangeable Mercury propellers.

What comes in the replacement kit and is installation difficult?

The NOVINO kit arrives with all primary parts needed to rebuild the Flo-Torq II hub connection, enabling a field replacement without special machining. Installation is straightforward for anyone comfortable with basic prop removal and reassembly—greasing the spindle and following the sequence keeps the job quick and reliable.

• Includes forward thrust washer, drive sleeve, aft adapter, tab washer, and propeller nut.
• Requires removal of prop locknut, retainer, and forward thrust washer first.
• Slide drive sleeve and prop on shaft, install adapter and retainers, tighten locknut per spec.
• Apply marine grease to the spindle before reinstalling for smooth operation.

Are there any important exclusions or cautions before purchasing?

Confirm your propeller dimensions and shaft diameter to avoid buying a non-compatible kit. This part fits specific prop sizes and engine families, so check model years and whether your propeller accepts Flo-Torq II hubs.

• Fits common prop sizes such as 13 1/4 x 17 and 14 1/2 x 19 for interchangeable Flo-Torq II props.
• Not compatible with Mercury/Mariner models from 1977 and earlier.
• Not for Verado V8 engines that use a 1.25" prop shaft.
• Confirm Bravo One and Alpha One drive compatibility before ordering.

Who is this for: Boat owners, marine technicians, and DIYers running Mercury/Mariner outboards, MerCruiser Alpha/Bravo sterndrives, or qualifying Verado engines who need a reliable replacement hub to eliminate vibration, protect drivetrain components, and restore proper propeller performance. If you want a direct OEM-style replacement that you can install on the water or in the yard, this NOVINO kit is built to match Flo-Torq II fit and function.