J-Prop Saildrive Feathering Propeller

The feathering propeller that is easy to install and adjust. The SBD  J-Prop is tested and approved by Yanmar for Saildrive engines. The J-Prop SBD propeller is available for engines from 8 to 110 HP. J-Prop originally developed in Late 1980’s Awarded US Patent in 1991. Patent #5232345. Your new J-Prop will arrive fully assembled and is installed on the shaft just like any other propeller. Once this is done, It is a simple matter to adjust pitch to the correct setting for the best performance.

Easy to Install

  • No drilling required – quick installation
  • Shock absorbing rubber rings easy to replace

Minimizes Forces Transferred to Shaft

  • Absorbs the shock to the sail drive system when engaging  gear

Fail Safe Mechanism

  • No loss of power if damage occurs
  • Remains engaged even if damaged
  • Secure mounting is ensured by a system of splines and conical clamps
Beta Marine USA - jprop feathering propellers

Design Features

Helical Gears

J-Prop uses only helical (or continuously engaged) gears, resulting in two distinct advantages:

    1. The blades of the propeller will have identical pitch at all times.
    2. Helical gears have a large contact area producing more strength and less wear.
Materials

J-Props components are made from a variety of stainless steel and aluminum-bronze alloys. Each alloy is designed to suit the specific properties of the application. For instance, the pitch gear, blades, housing and tail-cone are all made from different alloys resulting in less wear between the parts. The combination of stainless steel and aluminum-bronze components also enhance lubrication and minimize corrosion.

Elliptical Blade

In the feathered position, J-Prop reduces drag under sail. The blade design provides equal thrust in reverse and forward.

Dimensions

Beta Marine USA - jprop feathering propellers - dimensions
Beta Marine USA - jprop feathering propellers - dimensions
HubCONOdMNCSPhLIL + I
63 250775949142513622410234
3018775949142515424210252
SD27775949142516325110261
833001006057162516025812270
35101006057162517026812280
SD151006057162517527312285
933501167073183018630713320
40111167073183019731813331
45211167073183020732813341
11645-101467783203521335115366
5001467783203522336115376
55101467783203523337115386
14555-10185105116253528045618474
600185105116253529046618484
6510185105116253530047618494

Ratings

Hub SizePower
63 mmup to 60 HP
83 mm55 to 100 HP
93 mm55 to 100 HP
116 mm120 to 240 HP
145 mm145 to 400 HP
Beta Marine USA - jprop feathering propellers

Pitch Adjustment

Differentially Geared Pitch Adjustment

The pitch setting is determined by the amount of rotation the planetary gears are allowed by the internal stop in the adjustable tail-cone. As the shaft and the drive gear rotate clockwise, the planetary gears rotate the blades. The pitch gear rotates counter- clockwise in this differential system. The housing remains stationary until the blades and pitch gear have rotated to the internal stop and therefore the pitch setting.

Beta Marine USA - jprop feathering propellers - pitch adjustment

Put the propeller’s blade in feathering position.

Beta Marine USA - jprop feathering propellers - pitch adjustment

Pull the ogival nose.

Beta Marine USA - jprop feathering propellers - pitch adjustment

Turn the ogival nose towards the «R» or «L» side depending on the type of engine (rightway or leftway) and reach the notch of the desired pitch.

Beta Marine USA - jprop feathering propellers - pitch adjustment

Release the ogival nose. Make sure that the reference. Line «0» matches the desire notch. Make sure that the ogival nose backs itself firmly against the props body.

Support Literature & Manuals

Beta Marine USA - marine diesel propulsion engines - jprop propellers user manual

J-Prop Propellers

Beta Marine USA - marine diesel propulsion engines - jprop propellers user manual

J-Prop Propellers for Saildrives

Beta Marine USA - marine diesel propulsion engines - jprop propellers user manual

J-Prop Propellers for Saildrives (with Rubber Dampers)

Dealer Network

We always recommend that you talk to your local Beta Marine dealer about what you are looking for, so that you can agree a specification of the engine and accessories you require and they will then quote you. A list of authorised Beta Marine US dealers maybe found within the interactive map below. If your state or city has no convenient nearby dealer, or if you would like to become a Beta Marine US dealer, please contact us to discuss your requirements.

Filter By
NameStateAddressPhoneWebsite

J-Prop Enquiry Form

YOUR DETAILS

YOUR BOAT

CURRENT PROPELLER

REQUESTED PROPELLER

reCAPTCHA is required.
Design Features

Design Features

Helical Gears

J-Prop uses only helical (or continuously engaged) gears, resulting in two distinct advantages:

    1. The blades of the propeller will have identical pitch at all times.
    2. Helical gears have a large contact area producing more strength and less wear.
Materials

J-Props components are made from a variety of stainless steel and aluminum-bronze alloys. Each alloy is designed to suit the specific properties of the application. For instance, the pitch gear, blades, housing and tail-cone are all made from different alloys resulting in less wear between the parts. The combination of stainless steel and aluminum-bronze components also enhance lubrication and minimize corrosion.

Elliptical Blade

In the feathered position, J-Prop reduces drag under sail. The blade design provides equal thrust in reverse and forward.

Dimensions

Dimensions

Beta Marine USA - jprop feathering propellers - dimensions
Beta Marine USA - jprop feathering propellers - dimensions
HubCONOdMNCSPhLIL + I
63 250775949142513622410234
3018775949142515424210252
SD27775949142516325110261
833001006057162516025812270
35101006057162517026812280
SD151006057162517527312285
933501167073183018630713320
40111167073183019731813331
45211167073183020732813341
11645-101467783203521335115366
5001467783203522336115376
55101467783203523337115386
14555-10185105116253528045618474
600185105116253529046618484
6510185105116253530047618494
Power Ratings

Ratings

Hub SizePower
63 mmup to 60 HP
83 mm55 to 100 HP
93 mm55 to 100 HP
116 mm120 to 240 HP
145 mm145 to 400 HP
Beta Marine USA - jprop feathering propellers
Pitch Adjustment

Pitch Adjustment

Differentially Geared Pitch Adjustment

The pitch setting is determined by the amount of rotation the planetary gears are allowed by the internal stop in the adjustable tail-cone. As the shaft and the drive gear rotate clockwise, the planetary gears rotate the blades. The pitch gear rotates counter- clockwise in this differential system. The housing remains stationary until the blades and pitch gear have rotated to the internal stop and therefore the pitch setting.

Beta Marine USA - jprop feathering propellers - pitch adjustment

Put the propeller’s blade in feathering position.

Beta Marine USA - jprop feathering propellers - pitch adjustment

Pull the ogival nose.

Beta Marine USA - jprop feathering propellers - pitch adjustment

Turn the ogival nose towards the «R» or «L» side depending on the type of engine (rightway or leftway) and reach the notch of the desired pitch.

Beta Marine USA - jprop feathering propellers - pitch adjustment

Release the ogival nose. Make sure that the reference. Line «0» matches the desire notch. Make sure that the ogival nose backs itself firmly against the props body.

Support Literature & Manuals

Support Literature & Manuals

Beta Marine USA - marine diesel propulsion engines - jprop propellers user manual

J-Prop Propellers

Beta Marine USA - marine diesel propulsion engines - jprop propellers user manual

J-Prop Propellers for Saildrives

Beta Marine USA - marine diesel propulsion engines - jprop propellers user manual

J-Prop Propellers for Saildrives (with Rubber Dampers)

Dealer Network

Dealer Network

We always recommend that you talk to your local Beta Marine dealer about what you are looking for, so that you can agree a specification of the engine and accessories you require and they will then quote you. A list of authorised Beta Marine US dealers maybe found within the interactive map below. If your state or city has no convenient nearby dealer, or if you would like to become a Beta Marine US dealer, please contact us to discuss your requirements.

Filter By
NameStateAddressPhoneWebsite
J-Prop Enquiry Form

J-Prop Enquiry Form

YOUR DETAILS

YOUR BOAT

CURRENT PROPELLER

REQUESTED PROPELLER

reCAPTCHA is required.
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