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Message
Changing prop from plastic to aluminum on Merc 2.5hp - Will it help?
Posted on 6/16/16 at 11:24 am
Posted on 6/16/16 at 11:24 am
I recently bought a 15' flat back Old Town Predator SS150 Canoe and a 2007 2.5hp Merc to go with it. The motor runs fine, but I think it should push me a little better than it does. Has anyone ever upgraded the plastic prop it comes with to this Quicksilver Black Diamond Aluminum Prop? I'm wondering if I will see any, even small, improvement in speed.
I'm currently running at 8mph empty but can't get on plane. I am hoping changing the prop will help, even just a little. But if it won't do any different, I won't waste the $90. The design on the prop appears to be the same, so only the material of the prop would be changing.
Canoe:
Motor - you can see the prop on the motor in this picture:
I'm currently running at 8mph empty but can't get on plane. I am hoping changing the prop will help, even just a little. But if it won't do any different, I won't waste the $90. The design on the prop appears to be the same, so only the material of the prop would be changing.
Canoe:
Motor - you can see the prop on the motor in this picture:
4
Posted on 6/16/16 at 11:27 am to The Last Coco
2.5 is really small. That might be all the power it has. I would get a trolling motor.
Posted on 6/16/16 at 11:31 am to The Last Coco
8mph sounds pretty impressive.
Posted on 6/16/16 at 11:35 am to The Last Coco
Sorta related, I saw a propane powered outboard a few weeks ago. I had no idea. You just pug in a lantern canister. I was amazed. Instantly thought about whether one would work on Mung's Commander.
Posted on 6/16/16 at 11:45 am to ctiger69
quote:
2.5 is really small. That might be all the power it has.
Over about 75% throttle, I get no increase in speed but there is a definite increase in RPM. I think the plastic prop is flexing so I was hoping aluminum would be able to deliver at the top of the RPM range.
quote:
I would get a trolling motor.
I have one. The trolling motor will only push it about 5mph and I would have to deal with the battery. The outboard has a self contained gas tank and only weighs 40#.
Posted on 6/16/16 at 11:48 am to AlxTgr
NuCanoes are rated for 2.5 hp motors.
Posted on 6/16/16 at 12:00 pm to The Last Coco
It might just be making more engine noise from loading up but really not speeding up hardly any. You'd need a tach to really tell.
I'd have buy an aluminum prop just for the sake of having the plastic for a spare. If you pick up speed, great. If not, you have a spare prop.
I'd have buy an aluminum prop just for the sake of having the plastic for a spare. If you pick up speed, great. If not, you have a spare prop.
Posted on 6/16/16 at 12:08 pm to DownshiftAndFloorIt
quote:Plus, I don't think the OP is gonna get that canoe on plane with a 2.5 hp motor, irrespective of the prop composition (unless he has a heck of a tailwind).
I'd have buy an aluminum prop just for the sake of having the plastic for a spare. If you pick up speed, great. If not, you have a spare prop.
Posted on 6/16/16 at 12:09 pm to dawg23
quote:
Plus, I don't think the OP is gonna get that canoe on plane with a 2.5 hp motor, irrespective of the prop composition (unless he has a heck of a tailwind).
I am veeery close to planing. A little better weight distribution and I think I'll be there.
Posted on 6/16/16 at 12:11 pm to The Last Coco
Yea you could probably make much more difference with weight distribution. It's tough to do on something that short with low hp. 2.5hp ain't much at all.
Posted on 6/16/16 at 12:12 pm to DownshiftAndFloorIt
quote:
I'd have buy an aluminum prop just for the sake of having the plastic for a spare. If you pick up speed, great. If not, you have a spare prop.
I'd just stand pat. Having a spare prop for a canoe isn't a big of a deal. If you run across a problem where your prop is no longer good, paddle back. If for some reason you feel the need for a spare, just buy another plastic one for $15. You're not going to get 25% more speed out of an aluminum, if you get anything at all. Put that money towards a new cooler or rod and reel.
Posted on 6/16/16 at 2:20 pm to The Last Coco
If the alum prop is gonna run you $90, sell the 2.5HP motor and get a 5HP. Then you'll get on plane like buttah. I'd buy a spare prop no matter what outboard I had though.
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