prop help what size

[fordmugg]

ok i got all the info had the boat out today ......it is a 74 kona 17 ft with a 115 hp mercury outboard and it has a 4 blade 17 pitch ......took the garmin WOT does 39 mph at 5,100 rpm ........so what i want to do is get a little more top end speed so maybe a 3 blade 17 pitch or 3 blade 19 pitch ....need help from people that know .....also here is a pic of the boat so it might answer any question

 

[fordmugg]

Re: prop help what size

so here is the rpm range i just found it on here 4750-5250 RPM

 

[walleyehed]

Re: prop help what size

Your best bet for gaining performance on this type of hull is being open-minded enough to possibly raise the engine on the transom and shoot for maximizing the set-up which will likely end with a stainless prop of GOOD quality and the AV plate 2-3" above boat bottom...it won't be as simple as changing props although I would not have chosen a 4-bld for that hull without a Jackplate...
Are you willing to play with the set-up a bit???

 

[fordmugg]

Re: prop help what size

Your best bet for gaining performance on this type of hull is being open-minded enough to possibly raise the engine on the transom and shoot for maximizing the set-up which will likely end with a stainless prop of GOOD quality and the AV plate 2-3" above boat bottom...it won't be as simple as changing props although I would not have chosen a 4-bld for that hull without a Jackplate...
Are you willing to play with the set-up a bit???

im willing to do whatever to it ....i bought it off a friend late last year and that was the prop that was on there .....so you say to raise the motor ? ....and where is the av plate....sorry im new to boats and just trying to learn

 

[quebec#1]

Re: prop help what size

I would look for a stainless 19 or 20 like a laser prop from mercury and would think you would be close to the 50 mph mark.