Solas Rubex Propeller 14.3 x 21 3-Blade LH Aluminium 150-300HP Mercury MerCruiser Yamaha 9512-143-21
SOL9512-143-21
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Solas Rubex 3 Propeller 9512-143-21
Aluminium 14.3" x 21" 3-Blade Left Hand Propeller
The Rubex 3 14.3" × 21" is a 3-blade left-hand aluminium propeller for Solas Rubex engines (4 3/4" gearcase, set by rubex hub kit), Solas part 9512-143-21. For this engine we list 4 pitches from 15" to 21". 21" is the highest pitch in the range – maximum top speed for light, fast hulls running lightly loaded.
Key Features
- ✔ Rubex interchangeable hub system – one propeller, many engines
- ✔ Hub kit absorbs impact and protects the gearcase
- ✔ Thru-hub exhaust for optimal flow
- ✔ 3-blade aluminium design
Technical Specs
| Diameter: | 14.3" |
| Pitch: | 21" |
| Blades: | 3 |
| Rotation: | Left Hand (LH) |
| Gearcase / Drive: | 4 3/4" |
| Spline Count: | Set by Rubex hub kit |
| Material: | Aluminium |
| Solas Part No.: | 9512-143-21 |
Is 21" the Right Pitch for Your Boat?
A 21" pitch means this propeller would, in theory, move the boat 21" forward for every full turn. The right pitch lets your Solas Rubex reach the full-throttle RPM range given in its owner's manual with a normal load on board.
- ✔ Engine over-revs at full throttle? Go up in pitch.
- ✔ Engine can't reach its rated RPM, or the boat is slow to plane? Go down in pitch – the next size down for this engine is 19".
- ✔ Rule of thumb: a change of 1" in pitch moves full-throttle engine speed by roughly 150–200 RPM.
Other pitches for your Solas Rubex:
- 15" pitch (15" diameter) – the lowest pitch in the range – maximum thrust for heavily loaded boats, pontoons, workboats or towing.
- 17" pitch (14.8" diameter) – a low pitch – stronger acceleration and pulling power for heavier loads, towing and water-sports.
- 19" pitch (14.5" diameter) – a high pitch – more top speed and lower cruising revs for lighter, faster hulls; roughly 300–400 RPM more at full throttle than 21".
Compatibility / Fitment Guide
| Make/System | Model/Application | Notes |
|---|---|---|
| Mercury | 150-300 HP – 4 3/4" gearcase | Requires matching Rubex hub kit |
| MerCruiser | 150-300 HP – 4 3/4" gearcase | Requires matching Rubex hub kit |
| Yamaha | 150-300 HP – 4 3/4" gearcase | Requires matching Rubex hub kit |
| Suzuki | 150-300 HP – 4 3/4" gearcase | Requires matching Rubex hub kit |
| Honda | 150-300 HP – 4 3/4" gearcase | Requires matching Rubex hub kit |
| Evinrude | 150-300 HP – 4 3/4" gearcase | Requires matching Rubex hub kit |
| Volvo Penta | 150-300 HP – 4 3/4" gearcase | Requires matching Rubex hub kit |
Required Hub Kits & Cross Reference
| Solas | 9512-143-21 |
| Rubex hub kits (sold separately) | RBX-100 OMC 1991+; RBX-101 OMC 1984; RBX-102 Mercury/Mariner/Force/Honda; RBX-203 Yamaha 115HP+; RBX-104 Suzuki V6; RBX-105 Volvo SX 1995+; RBX-107 Honda; RBX-151 Evinrude G2 H.O.; RBX-127 Yamaha F350 |
Questions & Answers
Will this propeller fit my Solas Rubex?
It fits Solas Rubex engines with a 4 3/4" gearcase, set by rubex hub kit. Check the fitment table above and compare the size stamped on your current propeller (14.3" × 21") before ordering.
Should I choose 21" or a different pitch?
Keep the same pitch as your current propeller if the engine reaches its rated full-throttle RPM. If it struggles to reach rated RPM, 19" is the next step down.
Is this a genuine original part?
This is a genuine Solas propeller – a premium aftermarket replacement made to meet or exceed original equipment (OE) fitment and performance.
How do I know if it is compatible?
Check the Solas part number (9512-143-21) or OEM number on your current propeller, plus your gearcase size and spline count. If you are unsure, send us your engine make, model and year and we will confirm fitment before you order.
Does this propeller require a separate hub kit?
Yes. Rubex propellers use an interchangeable hub. The correct Solas Rubex hub kit for your engine is required and is not included.
Is this a left-hand propeller?
Yes – this is a left-hand (counter-rotation) propeller for counter-rotating engines or the counter-rotating side of twin installations. Check your engine rotation before ordering.
Note: Please verify your engine's gearcase size, spline count and propeller size against the references above before purchasing. Domain: 4boats.co.uk
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