E-conomictest
22.06.2021 4:30:24
Maybe they exist but, I have never seen a Hub Kit for BRP Prop that would permit usage on a Merc.
See full version: What is a good prop for a 115 optimax
Maybe they exist but, I have never seen a Hub Kit for BRP Prop that would permit usage on a Merc.
Recently bought a 2010 lund 1725 explorer ss with a 2010 115 optimax. have not ran it yet because I don't have a usable prop. It does have a prop but I am not sure if it is the one that the boat actually had on it or if someone had one lying around and just threw it in, and sold the original good one that was on there. The prop is a 13.5 x 15 evinrude aluminum prop, doesn't even have the hub on it, I thought for a second that the lower unit was blown but after taking off the prop I realised that it is missing the rubber hub. The prop is damaged, so should I go get this one fixed or should I look for another one? I looked at the mercury prop finder thingy and it told me to use a prop from 13 x 19 through 13.25 x 21, so this one seems way too small! Or they also told me to use a smaller 4 blade. I boat around where there are tons of underwater rocks, prop strikes sometimes happen, so I probably want to go with an aluminum prop, it will have a smaller chance of damaging the lower unit, and be cheaper to repair. I usually go camping with my boat, so often it is pretty well loaded. However when I unload on some island i'd like to have some decent speed. What would be the best prop, and should I maybe get two props and what size? [links]
That SS 19 might be Perfect for your combo. The 90 it came off and your 115, if the same displacement, will have a different RPM point where the highest power occurs, so your 115 would have greater ability to spin the Prop at a Higher RPM. If the engines were of Different Displacement, they would likely have Different Gear Ratios, the 115 geared to spin a Prop at a higher rate than a 90.
Engine manufacturers will select gear ratios over several models of engines so that the majority of times the Props needed are condensed. That way the Dealer doesn't need to stock Pitches from 10" to 30", when the majority of times 17 - 21 will do here
Don't fret about Diameter, for some reason, the past year that seems to be the new Rage on this Forum, Diameter. Let the Prop engineers be concerned about that. A lot of Prop Lines, have the Diameter decreasing as Pitch increases.
I am leaning toward the new four stroke, but wanted to see if anyone had experience with the Optimax and could make me feel better about my concerns. We actually got a good enough deal on the boat, that either way on the repower, I am still just below what most comparable used are selling for.
[quote="captain28570"]You do know the Sea Pro version is a commercial model? I don't think it comes with the same warranty as the regular 115.[/quote]
2014 Lowe SS210 with Strakes and Underskin
2016 Mercury SeaPro 115hp 15x15 Enertia Prop
Lowrance Elite 7 Ti TotalScan
A prop is described by its diameter and pitch, always in inches, and always in that order. So a 14 x 24 prop is 14 inches in diameter, and has a pitch of 24 inches. The diameter is simply the distance across a circle scribed by the blade tips. Pitch refers to the distance forward the prop would move as it makes one revolution. Imagine the prop is a screw turning in wood. If you rotate that 24-pitch prop one revolution, it would move 24 inches into the wood. The dimensions of the prop are usually etched in the tube or stamped in the hub. So find those numbers and make a note. This is where you are starting. here
Next, you’ll need to know the WOT (wide open throttle) operating range of your motor. Check the owner’s manual, the manufacturer’s website, or a dealer can look it up for you. The WOT rpm range is determined by the outboard manufacturer, and is where you want to motor to be under full throttle and optimal trim. A 2.6-liter Evinrude E-TEC, for example, has a WOT range of 4850 to 5850 rpm. For older two-stroke motors the WOT range is typically 4500 to 5500 rpm. On newer four-strokes and direct-injected two-strokes, the range is often at higher rpm and is narrower, 800 to 600 rpm rather than 1000 rpm. Ideally, you’ll prop for an rpm right in the middle to upper part of that range. here
So here’s some advice for those buying a new boat – it is often the dealer’s responsibility per his agreement with the outboard manufacturer to sell you the boat with the correct-size prop. Before you take delivery of the boat, ask the dealer if he has tested the boat, or one like it, to make sure it’s propped correctly. An then ask to be able to come back and exchange the prop that’s on the boat with a larger or smaller prop of the same type if you find that’s its outside the operating specs for the motor. Of course, you are going to make this exchange promptly, and you are going to bring back the original prop in pristine condition. more
R - Direction of Rotation (R = Right/Standard, L = Left/Counter) here
For safety, and efficient performance, it is critical that your engine operates within the RPM range recommended by the manufacturer. here
Pitch is always the last number listed. more
Most props are stamped with a series of numbers.
Look on the outer hub of the prop near the blades or inside the hub.