J-Prop 2 Blade Feathering Propeller

Design Features

Helical Gears

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

1. 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

Hub	CONO	d	M	N	C	S	P	h	L	I	L + I
63	25	0	77	59	49	14	25	136	224	10	234
	30	18	77	59	49	14	25	154	242	10	252
	SD	27	77	59	49	14	25	163	251	10	261
83	30	0	100	60	57	16	25	160	258	12	270
	35	10	100	60	57	16	25	170	268	12	280
	SD	15	100	60	57	16	25	175	273	12	285
93	35	0	116	70	73	18	30	186	307	13	320
	40	11	116	70	73	18	30	197	318	13	331
	45	21	116	70	73	18	30	207	328	13	341
116	45	-10	146	77	83	20	35	213	351	15	366
	50	0	146	77	83	20	35	223	361	15	376
	55	10	146	77	83	20	35	233	371	15	386
145	55	-10	185	105	116	25	35	280	456	18	474
	60	0	185	105	116	25	35	290	466	18	484
	65	10	185	105	116	25	35	300	476	18	494

Ratings

Hub Size	Power
63 mm	up to 60 HP
83 mm	55 to 100 HP
93 mm	55 to 100 HP
116 mm	120 to 240 HP
145 mm	145 to 400 HP

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.

Put the propeller’s blade in feathering position.

Pull the ogival nose.

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.

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

J-Prop Propellers

J-Prop Propellers for Saildrives

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.

J-Prop Enquiry Form

If you are human, leave this field blank.

YOUR DETAILS

Name *

Phone *

Email *

Confirm Email *

Date of Order *

Date Delivery Required *

YOUR BOAT

Boat Make and Model *

L.W.L *

Gross Tonnage *

Engine Make and Model *

Horse Power *

Normal Crusing RPM *

Gearbox Make and Model *

Gearbox Ratio *

CURRENT PROPELLER

Current Propeller Diameter *

Current Propeller Pitch *

Current Propeller Type *

Rotation *

Right Hand

Left Hand

Number of Blades *

Two Blade

Three Blade

Four Blade

Other Significant Data

REQUESTED PROPELLER

Propeller Diameter *

Number of Blades *

Two Blade

Three Blade

Four Blade

Propeller Type *

Type: 63-A
Rating: Up to 60 HP
Shaft Dia: 25 - 30mm
7/8" - 1-1/4"

Type: 83-B
Rating: 55 - 100 HP
Shaft Dia: 30 -35mm
1-1/4" - 1-3/8"

Type: 93-C
Rating: 90 - 140 HP
Shaft Dia: 35 - 45mm
1-1/2" - 1-3/4"

Type: 116-D
Rating: 120 - 240 HP
Shaft Dia: 45 - 60mm
1-3/4" - 2"

Type: 145-E
Rating: 145 - 400 HP
Shaft Dia: 55 - 70mm
2" - 2-3/4"

Please enter the values/measurements (in either millimeters or Inches) of the corresponding diagram references below.

D: Max. Diameter *

D2: Min Diameter *

DF: Thread Diameter *

LC: Cone Length *

LF: Thread Length *

P: Thread Pitch *

C: Key Width *

Type of Connection on Shaft *

SAE UAE (1:16)

British (1:12)

ISO 4566 (1:10)

Vetus (1:10)

Volvo (1:10)

Saildrive

Other...

Captcha *

reCAPTCHA is required.

SEND