5hp performance

Evinrude Boater

Lieutenant Junior Grade
Joined
Jul 6, 2004
Messages
1,144
I'm looking for a motor to put on a 10' fiberglass tender. What sort of performance would a 5hp provide? Is 5hp just about right for it?
 

ztim

Chief Petty Officer
Joined
Mar 19, 2004
Messages
421
Re: 5hp performance

I have a 6hp on my 12' semi v-hull and it wants to pain but just can't get there. For your 10', depends what kind of hull you have. Fiberglass sounds much heavier than my aluminum.
 

Evinrude Boater

Lieutenant Junior Grade
Joined
Jul 6, 2004
Messages
1,144
Re: 5hp performance

My boat is a flat bottom boat. I recall my neighbour who had this boat saying he put a 9.9 Merc on it and it was crazy scary. That's why I figured a 5hp would be better. The marketing literature in the day shows it on small fishing boats and sail boats.
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: 5hp performance

i think it will get you where you are going, not real fast though,
 

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: 5hp performance

It all depends on the style of the boat.If the bottom has a nice flat run it may get up and plane.By your self you may have to rig or buy a tiller extension so you can sit forward.
Our old 12' steel flat bottom with a 5 hp Buccaneer used to allmost jump on plane with me (180lbs)on the middle seat.
 

Frank Acampora

Supreme Mariner
Joined
Jan 19, 2007
Messages
12,004
Re: 5hp performance

When I was a kid, we had a summer house on a lake with a 5.5 HP restriction. Most of the kids had 12 foot aluminum Sea Nymph type hulls. They zipped along quite nicely. Me? My parents wanted to be comfortable so I was stuck with a 13 foot closed bow fiberglass Starcraft. The Rude 5.5 got her up onto plane but, of course, it couldn't keep up with the aluminum open boats.

THEN I GOT A 6 FOOT JON! Put a Johnson 20 on it. Ran a measured mile in one minute ---That's 60 MPH. Of course, it was inevitable: I flipped it. But in those days I was an indestructible teenager.

Ahhh! The old days were fun.

So, getting back on topic, your 5 Hp may be quite adequate. Really depends on the hull type and what you want to do. Also depends on whether it's a 1 or 2 cylinder 5. Twos are smoother with more torque.
 

longshanks

Petty Officer 2nd Class
Joined
Jun 12, 2006
Messages
188
Re: 5hp performance

I'm running a honda BF5, 1-cyliner 4-stroke. Great motor, very quiet, dependable, and odorless. However, it's sure not a powerhouse, and I'm not sure if it would plane ANY hull. As stated, the 2-cylinders are smoother, and with more torque. I'm not aware of any present-day production motors that offer a twin, in less than, about 8HP?

cheers
 

Frank Acampora

Supreme Mariner
Joined
Jan 19, 2007
Messages
12,004
Re: 5hp performance

OK TM. Here goes!

I had just bought the 20 Johnnie to put on the 13 footer for use at other lakes and the Hudson River. I don't remember exactly when or why, but we had bought a 6 (or maybe 8) foot aluminum jon. I do remember that I needed to put the fuel tank in the bow and the hose just made it.
SO-- being young and dumb and full of --- Ah, --**** and vinegar, I decided to try the 20 at the end of the season (November) when no one was at the lake. (Upstate New York)

I launched the boat and quickly discovered that the only correct place for the full 6 gal. fuel tank was in the bow, to hold it down. Now I only weighed 120 then. But, I needed to sit in the center and reach back for the tiller.

Even with me in the center, if I gave it full throttle for a hole shot, she would jump out of the water and come down on the stern, taking on water. So, I had to ease on the throttle until it was planing.

We had a measured mile on the lake so I took a flying start and covered it in one minute flat. Man! That engine was humming -- sounded real good.

Even on the protected calm water, I could see the hull bottom flexing and moving over the slight ripples in the water. 45 plus years later, I can still see it.

I made the run two or three times and on the last run I got a little wiggly--don't remember the reason. Couldn't have been more that 2-3 seconds. I corrected and the engine corrected, I over-corrected and then the engine responded by pulling the tiller out of my hand and turning immediately to full lock.

This flipped the boat 360 degrees and threw me out--Mind you, in winter coat, jeans, and shoes. Man! That was heavy--don't know how I managed to stay afloat. Water was cold too.

Meanwhile, the tank was floating outside the boat and miraculously still connected to the engine. The engine had spun down to idle, continued to run, and the boat was nearly full of water, barely floating, and making slow, tight, circles.

The indestructible teenager decided that the prop was no great danger and paddled over to the boat. I hit the kill switch (Thank God it had one) and dog paddled the boat about 1-200 feet over to the shore where I bailed it out (don't remember how), re-floated it, and headed home at part throttle.

Never told my parents how I got so wet. I may be crazy, but I'm not stoopid. sic.

As a matter of fact, I enjoyed the experience so much that two seasons ago I decided to flip a 10 foot fiberglass tunnel hull with a Chrysler 20. It wasn't quite the same. I was only going about 25, was wearing a PFD, and I dove out when I saw she was going to go. How does a man so old get so crazy, you ask? The question is: how does a man so crazy get to be that old?
 

ztim

Chief Petty Officer
Joined
Mar 19, 2004
Messages
421
Re: 5hp performance

Now that was funny. But at least I know why now you had to throttle up more slowly.
 
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