Originally Posted by dkall
Say many feathing props will still turn a velvet drive tranny. So you still need a brake. I found that out after I purchased and added an Autoprop. I've also read where the max prop will spin but don't have first hand knowledge of those.
Since the blades are completely lined up with the water
flow, have no curve, and there is more blade area behind the center of rotation, Max props tend to stay feathered in most situations and therefore won't drive the shaft. See the warnings at the bottom for exceptions. I've not had my max prop open up once feathered, but I haven't been racing
my boat in 30 knots of wind
with the chute up to achieve 16 knots of boatspeed that I have heard sister ships have done.
PYI Inc. Max-Prop PSS Shaft Seal Seaview Radar Mounts R&D
4) PROPELLER USE
The Max Prop works automatically. By putting the engine
the blades will engage in either forward or reverse. The best way to feather the propeller
- Power at 2 to 3 knots in forward.
- Kill the engine while still engaged in forward.
- When the engine has stopped, if the shaft is still spinning engage the transmission in reverse to stop the freewheeling.
You can check to see if the propeller is feathered or not by taking the engine out of gear
. If the propeller is not feathered the shaft will freewheel like with a fixed blade propeller.
In that case start the engine again and repeat the three steps. If your propeller has been greased properly it will feather in a fraction of a second as soon as you stop the shaft from freewheeling. Once the prop is feathered, you can either leave the transmission in gear or out of gear, it does not matter. DO NOT
kill the engine while in reverse. In this case the blades will be in the reverse position and will not feather. You can actually use this feature to drive a shaft alternator.
IMPORTANT: If the Max-Prop is installed on a vessel that can attain sailing speeds over 15 knots, it is MANDATORY to return the transmission to neutral while sailing. If the transmission remains engaged and the propeller were to open (from hitting an object or water flow) it may turn the engine, flooding it, resulting damage to the engine.