Back to: What's new

Propeller diameter available for engine with larger gearcase

Another title could have been Boat propeller Diameter on command trust or big foot motors.

Many factor will influence rpm and diameter is one of them. I am seeing in the last several seasons some large pontoons being pushed by 60 hp engines that are command trust /or Bigfoot. This means that the gear case is in a larger category

The problem is that the lowest pitch props available for a bigfoot 60 hp would be 14×11 and reaching the minimum recommend RPM range becomes impossible….Same engine with a non-command thrust or not a big foot can runs a 2” smaller diameter propeller and a lower pitch is available
the key is the fact that it is also 2 “ shorter in diameter
In this case the lowest pitch available becomes a 12×9 an increase of about 900RPM

At Ace propeller our tech support team will be happy to answer any questions relating to propeller selection.