Prop pitch for Double Eagle 185

[N2013]

Want to ask the community as to what prop do they have on their 185 Double Eagle. Mine has a 115 Yamaha 4 stroke. Currently have two aluminums and have ran both. Would like to upgrade to a stainless prop for a little speed & durability.

- 13x19 gives me 25-28mph @ 4300-4500. Takes a bit to get up on step with gear on board but I prefer the top end.

- 13 1/4 x 17 gives me 22-25mph @ 4300-4500. Gets me up on step quicker but slower.

-Those with this boat, what pitch of prop do you currently have on your 185 Double Eagle?

-Is it aluminum or stainless?

-Approximate fuel burn in gallons at 4300-4500rpm?

-Trim tabs yes or no?

Thank you in advance.

 

[Pineapple Express]

One of the most critical factors of prop selection is achieving the rated WOT (wide open throttle) RPM for the engine. Test the boat with a normal load (people, gear, fuel, etc) and see what the WOT RPM is.

Yamaha recommended WOT RPM Range:
F115 year 2000-2014: 5000-6000RPM
F115 year 2015+: 5300-6000RPM

Most people suggest that you aim for the upper half of the range. You need to ensure that you get this right so you're not lugging the motor.

 

[Discus]

Needs to get a bigger motor.

 

[RageWelding]

You may need to try some 13 to 15p props

 

[doubleeagle]

I am running a 14.5 x 19 Ballistic stainless.. 3400 rpm,s roughly gives me 30 mph.
From a 150 etec. WOT is close to 5500 rpm and 52mph. No tabs

 

[RageWelding]

Your 19p prop is way under revving and is slipping badly at 25.63 %

Your 17p prop is slipping 25.78 %

Both about the same. Your slip should be down around 10 %

Call powertech propellers and talk to one of there techs and give them this info and they will help make you a decision on what prop they make will best suit your situation. Cant say enough good things about powertech.

 

[halimark]

Mine has a Solas, stainless 3 blade 13x19, but motor is a Johnston/Suzuki 2007 140 4 stroke, would NOT want less. No idea about fuel burn, just fill when it gets down, roughly same rpm and speed as you post, maybe little less rpm for speed on calm days. No trim tabs, 4 stroke 9.9 plus I do have a heavier than normal welded aluminum hard top. Prop was on boat when I got, never saw a need to change. I prefer to putt along at 3800-4200 @ 22-28 mph over speed demon style.

HM

 

[willydw]

I am running a 14.5 x 19 Ballistic stainless.. 3400 rpm,s roughly gives me 30 mph.
From a 150 etec. WOT is close to 5500 rpm and 52mph. No tabs

Hot rod.

 

[N2013]

WOT is 5900rpm @ 37mph.

 

[N2013]

**update**

Have put a new prop on but the boat as well has changed. I probably have an extra 80lbs onboard compared to last time. Have installed a 13.25x19 solas rubex. Took a couple burns today and only hit 5000rpm WOT, top end speed was 36-37mph. My understanding is that with this new prop, is that it’s causing the motor to lug. Initially I was pleased to see around 3800 RPM and cruising at 24mph, but let down with the WOT. I knew the slightly bigger prop would lower the WOT, but not 900RPM. Might need to go back down to a 13x19.

 

[salmonkiller01]

Playing with props is expensive unless you get loaners. The bigger diameter will make it lug. Not just the 1/4 inch diameter. Blades are larger too. If a 13x19 was working I would go back to that. I am the guy that tried 2 new 15 pitch props and went to 17 which I have 3 of now( merc enertia) and want to try 19p. At 1500 a piece it gets a bit pricey with twins

 

[N2013]

Playing with props is expensive unless you get loaners. The bigger diameter will make it lug. Not just the 1/4 inch diameter. Blades are larger too. If a 13x19 was working I would go back to that. I am the guy that tried 2 new 15 pitch props and went to 17 which I have 3 of now( merc enertia) and want to try 19p. At 1500 a piece it gets a bit pricey with twins

Agreed. There really isn’t any other option unfortunately I feel unless I’m missing something. I’ve spoken with a couple propellor shops, Yamaha dealers, forum folks. Gave it a shot. I wonder if a 13x19 rubex would be okay. At least it’s aluminum.

 

[Salmonslayer1992]

Agreed. There really isn’t any other option unfortunately I feel unless I’m missing something. I’ve spoken with a couple propellor shops, Yamaha dealers, forum folks. Gave it a shot. I wonder if a 13x19 rubex would be okay. At least it’s aluminu

I’ve always dealt with this company, I forget the owners name, but he’s always been very helpful and knowledgeable.

 

[ship happens]

Need to drop the pitch. 17

 

[N2013]

Need to drop the pitch. 17

You figure a 17 in the rubex would be better? A 19 wouldn’t do it?

 

[ship happens]

You figure a 17 in the rubex would be better?

Yep. I'll see if I got a used one kicking around you can try.

 

[salmonkiller01]

Need to drop the pitch. 17

Ship knows his stuff. Had I listened to him I wouldn’t be on prop 6 and 7

 

[N2013]

Ship knows his stuff. Had I listened to him I wouldn’t be on prop 6 and 7

Ya he does. Been a big help.

 

[InterMechanico]

Playing with props is expensive unless you get loaners. The bigger diameter will make it lug. Not just the 1/4 inch diameter. Blades are larger too. If a 13x19 was working I would go back to that. I am the guy that tried 2 new 15 pitch props and went to 17 which I have 3 of now( merc enertia) and want to try 19p. At 1500 a piece it gets a bit pricey with twins

I am the guy that benefited from the 15p prop tomfoolery