do they make that much of a difference. My boat currently has a 10-13 pitch 3 blade prop with a couple nicks in it. Will be replacing sometime in the future possibly with my (fingers crossed) tax return. The boat is a 14 ft McKee with are
30 HP 'rude tiller.checked the speed this weekend with the Garmin from my truck, and was doing 23 at wot
it is easier to beg forgiveness than ask permission
They help with hole shot a bit. But you may lose some top end speed. All this stuff varies boat to boat. What differences are you hoping to see?
4 blade props also help slow your boat at idle. If you troll alot it really helps.
'06 Mckee Craft
184 Marathon
DF140 Suzuki
I think you may have a hard time finding a 4 blade prop that fits your application. They do make them for small outboards, but they are generally low pitch models for slow applications needing more thrust.
For what you have, a 3 blade is all you need to look at.
Iain Pelto
Sea Hunt Triton 160 w/ 90 ETEC “JB3”
Native Manta Ray 14
I was talking to Powertech about their 4 blade props over 3 blades and they said I would have to at least drop down 1 or 2 pitches to make it equal to what I’m getting now.
Powertech sells a few 4 blades for small OBs and they have some good “rule of thumb” info re:prop changes on their website also. The best way to get it dialed in is to have some tach #s for reference.
thanks will probably stay with the 3 blade, how much difference does a few dings in the bridesmaid
it is easier to beg forgiveness than ask permission
stupid auto correct. Blades make?
it is easier to beg forgiveness than ask permission
Here is so old info on a prop check for my KW 196BR with Yamaha 115. The Solas is a 4 blade, the 16-k is Yamaha’s three blade stainless.
Boat RPM/Speed
13.5x16 13x15
Prop 16-k Solas
RPM
3500 17.5 15
4000 21.5 20
4500 26.5 25.5
5000 31.5 29
5500 35 32.6
5700 37.5 34.4
Sorry, I couldn’t get the columns to line up correctly.