ISO backup prop Honda 110

[Wood Zeppelin]

Hi Folks,

I'm looking for a backup prop for a new Honda 110. Since it's intended purpose is only to get me home in an emergency, would love to pick up any used ones that may be available? Where might a look for a use one?

[Wood Zeppelin]

Ooops - typo..

That's a Honda 100.

If I want a 4-blade prop for this motor, what size should it be?

[Schuster]

You may want to give Tacoma Propeller (https://www.tacomapropeller.com/) a call. I've always dealt with them in the past and they are very knowledgeable and can help you decide what prop is right for you. I would guess that they have used props but not sure about that.

[thataway]

I usually had a Stainless Steel as my primary prop, and a back up of Aluminum. The aluminum for a 22 with a 100 hp would be 13 x 15 (For Honda). Unless you have an exceptionally heavy boat, I would stick with 3 blade props.

[Wood Zeppelin]

Thanks for the info guys!

Yes, I have a 13.5" x 15 prop. With just me on a 22' Angler, I can get up to 6200 RPM (the range is 5500-6300, with 5900 recommended as optimum).

However, I am planning a family boat camping and fishing trip (FOUR adults + gear). Also, I may got to places like Lake Powell (~3500' elevation) but probably not higher than that.

My thinking is that a 14 pitch backup prop would be a good option. This could give the "lower gearing"I might want with bigger loads or higher elevations. However, when I look at genuine Honda parts, they skip from 15 pitch down to 13. But it seems other brands offer 14 pitch.

Should I just go with another brand that offers 14 pitch? Or does the jump to 13 pitch make more sense?

[ssobol]

My BF90D has a 13.5x15 3 blade Al prop. The motor is used mostly a low altitudes.

[Wood Zeppelin]

[Wood Zeppelin]

UPDATE:

The Honda west coast Master Tech just talked me out of a lower pitch. Instead he thinks I should go up to a 16 or 17 pitch.. why?

Because
(a) Newer fuel injected Honda's have barometers in them and the computer adjusts for elevation!

(b) Even with more load in a C-Dory, top speed is rarely a concern. I'll run a cruising RPMs more often (say 4000-4500?). At this RPM range, he argues, a 16 or 17 pitch would give me more speed and therefor lower fuel usage to go the same distance*.

*Note, this is considering my WOT RPM of 6200 (with just me in the boat) when 5900 is optimal and 5500 is the low end of the desired range.

[Hunkydory]

Maybe I’m missing something on the new technology, but I think the computerized fuel injection, just automatically creates the optimal fuel to air ratio, which gives the best possible hp performance at varying altitudes. Without adding a turbo or other device for making up the oxygen loss of higher altitudes, there is still going to be hp loss, as altitude increases, so I think still need for reduced prop pitch even with computer/barometer fuel air adjustments.

[Wood Zeppelin]

[jkidd]

Boat engines lose about 3 percent of their horsepower for every 1,000 feet of elevation above sea level. The only way to get it back is to supercharge the engine. I lose 24 percent of my horse power at Yellowstone and about 12 percent at lake Powell. You would adjust your pitch down to get the engine to run at WOT. I run a 19 pitch at sea level and might have to go down to a 15 pitch at 8000 feet depending on how much weight is on the boat.

[drbridge]

I have a Solas 4 blade prop that I ran on our Honda BF90A on our 22 cruiser.
SOLAS 1413-128-17 Aluminum 4-Blade Propeller - RH, 12.75" Diameter x 17" Pitch

It ran very nicely on our 22. Could be a good spare. We repowered with Yamaha and no longer need it. Located in Sequim.

[Wood Zeppelin]