i had a similar problem with my 25 foot Luhrs. i have a Chrysler 318 220-225 hp and 1 1/2 to 1 tranny. i found that going to a larger diameter...
i have a 1973 luhrs 25 foot flybridge convertible and it has a chrysler 318 it doesnt give me the speed i would like but it's very reliable and...