280 Dancer Props

Sure, ill have them tomorrow when I try them out. they are 14.25 diameter, 19P 4 blade aluminum. Ill have the performance numbers. My mechanic is estimating around 4600 WOT RPM for me, but remember, right now with the 17P vengance, I am at 4960 WOT and hitting the rev limiter, 41 MPH
 
OK, well here are my new numbers....WOT is at 4700-4760 RPM, byt GPS I am getting 38-40 MPH, depending on the conditions. at 3500 RPM, cruising 24-26 MPH....not to bad at all I am thinking, and no longer hitting the REV limiter. Hole shot is fantastic

Now, does anyone else have trouble trimming the motors? I can only trim out to 1 or 2, if I go to 3 or 4, RPMS go way up and I lose speed. I remember my BIII I could trim a ton...
 
This is a really interesting thread. I am having some issues getting out on the plane with my 2003 280 Dancer. I am not sure if it’s just because I am used to smaller boat, it just seems to take AGES to plane and if I push it too quick I get aeration and a beeping alarm that I’ve put on another thread to figure out what’s going wrong. I am going to pull the boat to replace zincs and will check my props. I would imagine theyre OEM.
 
Brian Lynch said:
This is a really interesting thread. I am having some issues getting out on the plane with my 2003 280 Dancer. I am not sure if it’s just because I am used to smaller boat, it just seems to take AGES to plane and if I push it too quick I get aeration and a beeping alarm that I’ve put on another thread to figure out what’s going wrong. I am going to pull the boat to replace zincs and will check my props. I would imagine theyre OEM.
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It takes me about 5-10 seconds (approximately) to get fully planning. I'm able to go to full throttle in about 2 seconds and don't get aeration. I'd check your props are stock or similar. Also do you have trim tabs, putting them both all down down can help (the adjust once on a plane). Also buildup on the hull could be slowing you down if she hasn't been out or cleaned in a while.
 
Tom MK said:
It takes me about 5-10 seconds (approximately) to get fully planning. I'm able to go to full throttle in about 2 seconds and don't get aeration. I'd check your props are stock or similar. Also do you have trim tabs, putting them both all down down can help (the adjust once on a plane). Also buildup on the hull could be slowing you down if she hasn't been out or cleaned in a while.
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Thanks, I definitely need to do something. I can’t go full throttle until I am well up and planing.
 
I’m having same issues with the stock vengeance props boat takes a country mile to plane. I’ve tried everything previous mentioned drives in tabs up tabs down. It cavitates or ventilates horrible barely gets on plane anything below 33-3400 she wants to come off plane. The hull is bottom painted. 3550-30 mph WOT 5100 43-44 mph. I bought 4 blade stainless Michigan wheel Apollo 14 5/8 x 16 put on the boat it’s worse now cavitates/ventilates. I used the same hubs I had with vengeance props. I pulled boat pulled props and studied the hubs starboard hub I found a crack
Port hub looks rounded like it has spun. Also when I put the hubs into the prop very loose fit. I’m picking up new hubs after work and will try them to see what happens.
 
I just removed my furuno transducer from transom and now looking at moving my garmin transducer which according to garmin is installed where it can cause cavitation/ventilation
 
Update I removed garmin transducer near port drive previous owner installed
Put 4 blade Michigan Apollo 14 5/8x16 on. It now gets on plane with ease. These are my numbers no tabs 3600 rpm 29 mph I can run down close to 3000 and stay on plane
Top speed is 42 mph at 5050 it will bounce rev limiter. This is with a full tank of fuel one person and bottom paint
You can see location of mount and transducer tie wrapped to cable
 

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I bought a new boat years ago that i felt was over propped from the manufacturer(not Searay) when I spoke to the dealer they said that's what they come with so that's what belongs on the boat. I called the manufacturer and got the we go to great lengths with Mercruiser to test and prop them correctly. I then spoke to tech support at Mercruiser who asked for the data as some of you have gone and compiled as well. Tech support ended up calling the dealer and telling them they were shipping a new set of props to them for me and they were to return the old set. This absolutely solved my problem and the boat performed much better.
As per Mercruiser they would like the boat propped to run being able to hit the rev limiter vs. being unable to reach the specified WOT for the engine package for the boat it's in. Nmocean had an inproperly mounted transducer causing cavitation so it doesn't apply here but everyone else with the 17P Vengence props that the boat came with were probably propped correctly at the time of manufacture of the boat. Fast forward to today and I'll bet a 280 with twin V6 Alpha One Gen II's will perform better with four blade stainless vs. three blade stainless props. As to the pitch if Nmocean is running the same boat with the same engine setup then he has done the hard part for you already.
 
I do know I can feel better control around dock with the four blades. Tonight, I drove the boat with three people it comes up with ease even better when using tabs. I’m very satisfied with the results I pulled her out to mount transducer in a different location. I’m figuring this boat hasn’t run right in several years.
 
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