Nose cone Phenomenon

[Ralph Savarese]

This week end was unbelievable for Donzi testing for me added a new From Mad dad I believe to be hydro motive nose cone to a 280 drive the boat developed an un believable violent chine walk so bad I could not control the boat. Started about 3500 RPM 45 MPH. Tried pin locations and other props no change. Removed it and back to normal. Also discovered using different props found my torque steer to the left rather than right that it has always been. Both I and Mike are boggled. I have had this boat for 44 years never experienced such lack of control Scary!

[blackboat]

Yout problem was most likely due to play in your steering and due to the design of that nose cone,it crabs to the side causing the violent chine walk you describe. the only way to correct it is to get all he play out of the steering and make sure nose cone is on straight. I had that exact thing happen to me with my donzi 20 years ago.

[Ralph Savarese]

Why would a nose cone make such a difference saw no performance change with or without all a saw was loss of control. what about reversal of torque steer to opposite side

[mrfixxall]

Why would a nose cone make such a difference saw no performance change with or without all a saw was loss of control. what about reversal of torque steer to opposite side

the torque steer problem was probably from the nose cone not being centered..

[Ralph Savarese]

No it pulled left with solas and ultra and pulled right with my michigan prop

[mrfixxall]

No it pulled left with solas and ultra and pulled right with my michigan prop

I never tried a solas and never will..that prop belongs on a back of a bay- liner cabin cruiser..the blade diameter is to big for a narrow classic..I run a 26 ultra and when approaching 70 mph it does all kinds of wacky things..Hydraulic steering some day