Yamaha 3 Blade Stainless Steel
PLEASE READ THIS Before you order any Yamaha Propeller 60hp-250hp
ENGINE HEIGHT SET UP IS THE MOST CRITICAL FACTOR THAT AFFECTS BOAT SPEED AND PERFORMANCE AND ENGINE REVS "THUS AFFECTING THE CHOICE OF PROPELLER CHOICE"
BEFORE SELECTING A PROP FOR 60HP -1250HP YAMAHA THAT SWING THE ORIGINAL EQUIPMENT "CLEAVER STYLE BLADE" YOU SHOULD MAKE SURE YOUR MOTOR IS NOT TO DEEP IN THE WATER.
Engine height rules
The only consistent rule is that the engine should be positioned on the transom so that at full revs the "anticavitation plate" (main plate just above the propeller) is just skimming the water at speed so you can see the plate.
- every inch the motor is deeper in the water a loss of 250 propeller revs and approx 1.5 mph is lost thus affecting boat speed.
- all cats and trihulls demand propellers with extra cupping to cope with aerated water conditions and prevent cavitation and ventilation and perform best with correct engine height.
- variable deadrise hulls work best with engines propped with wide blade area 3 blade or 4 blade props that can offer larger blade surface area and support the boat at low speed planning.
- beamy boats for their length all benefit again from large blade area props such as the "Solas New Saturn " or 4 blade "TorqueMaster"
- propeller heights on sterndrives you cannot do much about and can only hope that the boat manufacturer has trialled maximum heights on positioning of the Gimbal housing and drive--and its well proven that nearly all sterndrives using 4 blade propellers all offer better boat performance as the prop revs are lower then outboards and they require more blade area that the "TorqueMaster" offers.
Overall -- make certain your motor is not to deep in the water before selecting a prop and avoid costly changeovers.
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