I have a 20 ft sun chaser 820 cnf with a 90hp four stroke mercury with a black diamond prop 15 pitch and when I get up to 14 mph it cavitates and if I need another prop do i need to make an appointment to bring it in ?

Best to bring us the prop and let us inspect--could be the prop is worn and needs reconditioning, which could solve your cavitation problem. We can also talk to you about new prop options. No need to make an appointment--come by any time we are open, 8 a.m. to 4:30 p.m. Mon-Fri. Thanks!

All you need to do, Is talk to the gentleman tell him your problem, You can opt for your prop to be fixed, Or try a new one

They did my 20" prop and balanced my shaft in two days. A little pricey though

Nope just got bring it in drop it off. Took a week for them to redo my prop