Chrysler Prop

[MSzychulda]

Hello, I have a 1970 Chrysler 20 horse ouboard I picked up for a 14ft 1448 Lowe Jon Boat. The motor runs great and gets on plane with just me, but once a load is in the boat it begins to cavitate at high throttle. The prevent this I have to go slower and keep the boat off plane. I have adjusted the motor height and tilt with limited success. I have been running in the river and was told to have to prop cupped to prevent this. I have the factory 8 inch prop on right now. What suggestions do you have, and what cost am I looking at to have the propped cupped or pitch changed?

 

[steelespike]

Re: Chrysler Prop

I wonder if your prop hub is shot.Prop may have what they call a spun hub.A prop shop can repair<br />it with a new hub.Symptoms are very similar to cavitation. Good luck.

 

[Spidybot]

Re: Chrysler Prop

First you may check prop suppliers to know what is available for your motor.<br /><br />Then it takes some kind of investigation to know what to recommend. At least info on your boat size/weight, hull design and what rpm you acchieve at WOT.<br /><br />You can find further if you use the search and look for 'Wisdom of propellers'.