Need prop, loading advice

MWK

Cadet
Joined
Aug 12, 2008
Messages
6
After many years of owning an open bow with a outboard, my wife and I bought a Four Winns deck boat with a Volvo 5.0 I/O. I loved my outboard, but I'm not so sure about the I/O, but I'm still learning. Here's my two biggest problems; #1) with 10 people on board the thing won't plane out. We kept most toward the front, still no luck. I know it's a fairly heavy boat, but my 17' Cobia planed out with 6 on board in 5-6 seconds. Will this boat never plane out with a load on board, did I just make the biggest mistake in my life? Would a different prop help, or I've seen "hydrofoils" in a catalog, would they help? A little backgroud info, at our ages (fifties) we pull tubes, once in a great while a skier, but mainly just want to cruise around. We don't need alot of speed but we do need to plane out. Problem #2) this thing is a big pain to load on the trailer (bunk style). Our old boat loaded so easy and quickly and this is just plain hard. I admit I'm still new at loading, but it's so much harder to crank all the way to the bow rollers, I'm waist deep in water with the side bunkers under water, then maybe I can crank it. First time I ripped the stitching in the strap apart it cranked so hard. Is the bow supposed to rest on both bow rollers or just the upper or lower one. Sould the strap go between them or over the top or under the bottom one. I know we are going to like this boat, but so far it's been difficult. Can someone explain what I'm doing wrong or where to get more help? Thanks
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: Need prop, loading advice

10 people is a very big load on any recreational boat, especially a heavy deck boat. Step 1 is to make sure the engine is actually running correctly. Many people can't tell a proper running engine from one that is missing like crazy. You did not mention what prop pitch you are running so that would help us. And you also failed to mention what engine rpm you observe at wide open throttle with a light load. Without those numbers we can't be of much help. Without pictures of your boat on the trailer there isn't much we can help with there either. Pictures and details are always helpful.
 

MWK

Cadet
Joined
Aug 12, 2008
Messages
6
Re: Need prop, loading advice

Thank you Silvertip, I will try and get some additional info and some pics. I'm somewhat computer challenged but I will work on it. Any help will be greatly appreciated!!!
 

MWK

Cadet
Joined
Aug 12, 2008
Messages
6
Re: Need prop, loading advice

OK, I have some additional info; I bought the boat two weeks ago and had the oil changed, a new fuel filter and a tune-up. At wot rpms about 5000 (per tach on boat). Prop currently on boat 14.5 X 19, spare prop in box 15.5 X 15 "Michigan Wheel". I think I understand pitch somewhat, but how does one know what diameter to buy? Hope this helps... I am still working on the trailer pictures.
 

Irv964

Petty Officer 1st Class
Joined
May 3, 2008
Messages
315
Re: Need prop, loading advice

OK, I have some additional info; I bought the boat two weeks ago and had the oil changed, a new fuel filter and a tune-up. At wot rpms about 5000 (per tach on boat). Prop currently on boat 14.5 X 19, spare prop in box 15.5 X 15 "Michigan Wheel". I think I understand pitch somewhat, but how does one know what diameter to buy? Hope this helps... I am still working on the trailer pictures.

You don't normally worry about diameter, you find what pitch prop works best with your boat and run that with what ever diameter the prop came with........Irv964
 
Top