jmcknight00
New member
Just wondering if anyone has a similar setup. I just got the motor installed and am in the middle of the break in right now. I just ordered a doel fin to put on it as well. Thanks for the help!
Prop Size for 22 foot Angler with 115 Yamaha 4 stroke
- Thread starter jmcknight00
- Start date
jmcknight00-
I only have a 90 hp Yamaha on a heavier CD-22 Cruiser, but my boat is over proped with a 17 inch by 13.5 inch diameter prop, and finds a 15 inch pitch prop more satisfactory.
With your Angler, lighter weight, and 115 hp Yami, you should be able to use the 17 inch pitch prop to the fullest and into the ideal rpm range from 5500-6000.
The prop diameter should stay at about 13.5 inches.
All bets are off if you carry a lot of extra fuel, camping gear, crab pots, passengers, dogs, and coolers full of ice, beer, and fish! :lol:
Have a great weekend!
Joe. :teeth :thup
I only have a 90 hp Yamaha on a heavier CD-22 Cruiser, but my boat is over proped with a 17 inch by 13.5 inch diameter prop, and finds a 15 inch pitch prop more satisfactory.
With your Angler, lighter weight, and 115 hp Yami, you should be able to use the 17 inch pitch prop to the fullest and into the ideal rpm range from 5500-6000.
The prop diameter should stay at about 13.5 inches.
All bets are off if you carry a lot of extra fuel, camping gear, crab pots, passengers, dogs, and coolers full of ice, beer, and fish! :lol:
Have a great weekend!
Joe. :teeth :thup
Jeff & Mimi
New member
We also have a 90 HP Yamaha on our 22FT. Angler and we are useing a 13.5 x 17 Prop and is perfect match for are boat. Fully loaded for a two week trip We have found that when we can run at about 3800 RPM, 16 MPH, we get our best fuel economy.
jmcknight00
New member
Thanks for the help, I really appreciate it. What are your thoughts on 4 blade versus 3 blade and stainless versus aluminum?
James - Juneau, AK
James - Juneau, AK
3 blade works well for this application. SS is less flex, better if you are going thru mud/sand. But for most applications Aluminum is satisfactory. I had the 115 on a boat which was slightly shorter and about the same "factory weight"--less real weight. It was a great engine, with excellent economy.
I like the Doelfin for smaller engines and smaller boats such as inflatable boats. For the bigger boats I perfer the Permatrim-larger and aluminum. Minimal flex. Both the trim tabs and a Permatrim are the best combination.
I like the Doelfin for smaller engines and smaller boats such as inflatable boats. For the bigger boats I perfer the Permatrim-larger and aluminum. Minimal flex. Both the trim tabs and a Permatrim are the best combination.
In addition to Bob's correct assessments, I'll comment about the 4-blade prop.
It has more surface area than a three blade, hence a little more drag, and you'll also notice that it slips less with a better bite.
The result is a little less top end speed (more drag), and less flexibility in terms of speed range (since it won't slip as easily).
However, it's really better in very heavily loaded boats, like big cruisers, houseboats, workboats, tugs, and the like (better bite).
It also vibrates less with 4 blades turning rather than 3 at very slow speeds where you can feel and hear each blade turn in the water, like below 1000 rpm. Jim Gibson pointed this out to me years ago at a winter get-together in the California Delta. I drove his boat, and bought a similar prop!
Generally, then, Solas 15 inch pitch 13.25 inch diameter prop is a good alternative for a CD-22 Cruiser, particularly if you travel heavily loaded and often at higher altitudes, but probably not necessary with 115 hp!
As usual, it's a guessing game, and YMMV (Your Mileage May Vary)! :lol:
Joe. :teeth :thup
It has more surface area than a three blade, hence a little more drag, and you'll also notice that it slips less with a better bite.
The result is a little less top end speed (more drag), and less flexibility in terms of speed range (since it won't slip as easily).
However, it's really better in very heavily loaded boats, like big cruisers, houseboats, workboats, tugs, and the like (better bite).
It also vibrates less with 4 blades turning rather than 3 at very slow speeds where you can feel and hear each blade turn in the water, like below 1000 rpm. Jim Gibson pointed this out to me years ago at a winter get-together in the California Delta. I drove his boat, and bought a similar prop!
Generally, then, Solas 15 inch pitch 13.25 inch diameter prop is a good alternative for a CD-22 Cruiser, particularly if you travel heavily loaded and often at higher altitudes, but probably not necessary with 115 hp!
As usual, it's a guessing game, and YMMV (Your Mileage May Vary)! :lol:
Joe. :teeth :thup
jmcknight00
New member
Well, I just left the same prop on there. It is a three blade aluminum 13.25 inch 15 pitch. I only have 9 hours on it so far, but I've been pretty happy. Fully loaded I cruise about 25 mph on the gps at 4,500 rpm. I did put a doel fin on the engine and that enables me to get up on step even at 12 mph, which is nice when it's choppy (which it frequently is in Juneau, AK). I pegged it out at about 5,800 rpm for a minute or so and we were going about 38 mph. It wasn't quite WOT, but I didn't really want to max it out. I haven't figured out my mpg yet, but it looks like it will be considerably better than my old 85hp Yamaha. I think the prop is going to work out quite well. As far as the engine size, I am happy I went with the 115 so far. It is a little heavier, but not enough to be a detriment and it's nice that I don't have to run at 5,700 rpm anymore. Thank you for all who helped!
jmcknight00
New member
Yes, felt a little too fast. Didn't feel real squirrelly, but still didn't want to do it very long. I like cruising about 25. Comfortable speed, and the mileage is still pretty good.
baensch-ak
New member
Hello, prop men (or women),
We have a prop question for the Lake Powel/Yellowstone, high altitude experienced crowd.
WHAT IS THE RIGHT PROP PITCH FOR THOSE VENUES, please?
Cape Cruiser 23' with 115 Yamaha. Present prop for sea level: Michigan Wheel
stainless steel three bladed 13 3/8" diameter by 15" pitch, which works fine, sea level to 3000".
Typical load: 2 modestly dimensioned adults and long-term supplies on board.
Thank you for your feed-back, Al & Karen (HARMONY)
We have a prop question for the Lake Powel/Yellowstone, high altitude experienced crowd.
WHAT IS THE RIGHT PROP PITCH FOR THOSE VENUES, please?
Cape Cruiser 23' with 115 Yamaha. Present prop for sea level: Michigan Wheel
stainless steel three bladed 13 3/8" diameter by 15" pitch, which works fine, sea level to 3000".
Typical load: 2 modestly dimensioned adults and long-term supplies on board.
Thank you for your feed-back, Al & Karen (HARMONY)
Matt Gurnsey
New member
The Yamaha spec for the 115 is a WOT of 5000 to 6000 RPM. If you're hitting 5800 the you're dead on where you want to be. I wouldn't change a thing.
baensch-ak
New member
H, Matt,
Thank you for your reply. I am happy with the way the boat/motor performs on the Sound and even at modest altitudes like the Prineville Reservoir or Lake Billy Chinook here in Central Oregon. My concern was primarily for Lake Powell, which is, as far as I have been able to find out, at just under 3,700 feet elevation, another 2,000 feet higher than our lakes here. I have also heard from a Lake Powell visitor that he could not get C-Dory 25 on plane until he got a prop with a lower pitch.
Is there a formula that can be used to estimate power loss versus altitude and relates that to pitch reduction to maintain RPM/power? There ought to be one I would think, but I have looked all over the i-net and not found one. My guess is that reducing pitch from 15" to 13" would work for me, but it is only a guess.
Thank you, Al
Thank you for your reply. I am happy with the way the boat/motor performs on the Sound and even at modest altitudes like the Prineville Reservoir or Lake Billy Chinook here in Central Oregon. My concern was primarily for Lake Powell, which is, as far as I have been able to find out, at just under 3,700 feet elevation, another 2,000 feet higher than our lakes here. I have also heard from a Lake Powell visitor that he could not get C-Dory 25 on plane until he got a prop with a lower pitch.
Is there a formula that can be used to estimate power loss versus altitude and relates that to pitch reduction to maintain RPM/power? There ought to be one I would think, but I have looked all over the i-net and not found one. My guess is that reducing pitch from 15" to 13" would work for me, but it is only a guess.
Thank you, Al
colbysmith
Active member
I've got the C-22 crusier with a Mercury 115 EFI 4-stroke. The current prop is a stainless 13 3/4 x 13. I would like to switch to an aluminum prop. I think the current one seems to be running ok, but wondering what others with this boat and engine are using for props. Thanks. Colby
On our first C Dory (90 hp Evinrude 2 stroke)--we used a 17" seal level, 15" powell, and 13" at the highest elevation. Dropping at least 2" is advisable.
Mercury puts out a chart showing HP loss at altitude. About 10% at 3500 feet and 20% at 7,000 feet. So a 90 would be close to 81 at 3000, and about 72 at 3500 feet. A lot depends on loading, type of prop, cupping etc. So far our Honda 90 carbonated runs well enough at Powell, that we are sticking with the 15" on the 2006 boat. If I was to pick up a second prop, I would go with 13".
On the 25, we finally ended up with an 11" pitch (down from 15) on Powell. But that boat was under powered with the Honda 130 and also loaded. The engine was badly lugging with the 15" prop.
Mercury puts out a chart showing HP loss at altitude. About 10% at 3500 feet and 20% at 7,000 feet. So a 90 would be close to 81 at 3000, and about 72 at 3500 feet. A lot depends on loading, type of prop, cupping etc. So far our Honda 90 carbonated runs well enough at Powell, that we are sticking with the 15" on the 2006 boat. If I was to pick up a second prop, I would go with 13".
On the 25, we finally ended up with an 11" pitch (down from 15) on Powell. But that boat was under powered with the Honda 130 and also loaded. The engine was badly lugging with the 15" prop.
baensch-ak
New member
Thank you very much, Thataway, for this useful information. It matches my guesstimates, but it is nice to have confirmation based on experience.
Al & Karen
Al & Karen
Rob & Karen
New member
Colby,
My Mercury 115 came with a Mercury 17 pitch prop, but the WOT rpm's were low. I have both the 3 blade and the 4 blade aluminum Solas 15 pitch props. They are both good. I keep the 3 blade on the boat and it gives about 5600 rpm's at WOT. The desired range on my engine is 5000-6000 rpm's at WOT.
Rob
My Mercury 115 came with a Mercury 17 pitch prop, but the WOT rpm's were low. I have both the 3 blade and the 4 blade aluminum Solas 15 pitch props. They are both good. I keep the 3 blade on the boat and it gives about 5600 rpm's at WOT. The desired range on my engine is 5000-6000 rpm's at WOT.
Rob
A
Anonymous
Guest
When i had the F-115 for a decade on my 22, the right props, heavy or light, were always 18 to 19 P 3 blade SS. I tried a 4 B SS Stiletto prop, way too much.
If your going to be around a lot of ice and bulb kelps up there, definitely SS!
If I had to do it over again and had a F-115, I'd try the Solas 4B 17 P SS...
If your going to be around a lot of ice and bulb kelps up there, definitely SS!
If I had to do it over again and had a F-115, I'd try the Solas 4B 17 P SS...
I have used the 13 1/4 x 17 aluminum prop on a yamaha 90 for 110 hours since new. In perfect water and as trimmed for speed as I can get I see 5400 at wot. I am running heavier this year so top is about 22 knots. I had a 13 1/4 x15 alum prop made for lake Powell and I think it may be my full load sea level prop. I'm looking to see 5800 wot. Will be testing for Comox cbgt. If it is a better fit I may then do a 13 1/4 x 13 for powell and higher lakes. George
colbysmith
Active member
Since my last msg here, I have replaced my SS prop with a 3 bladed 14 x 13 aluminum Mercury Black Max, and then stuck that one away for a spare, replacing it with a 4 bladed Solaris Rubex 13 1/4 x 13. I don't have all the technical details, but both props run WOT at about 5600-5800 rpm. (CD-22 Cruiser with Mercury 115 EFI 4-stroke). I have the SS Solaris 13 3/4 x 13 for sale now. Don't need the additional weight of Stainless, and happy with both aluminum props. Have the SS listed on Criagslist for $200. Colby