How fast will it go

[Bubbles Up]

Hi all,

I am in love with my new to me 1974 9.9 Evinrude,much better at trolling than my old '79 Merc 7.5.
Any ideas on how fast this thing will go (top speed) with my 215lb butt in my 12 foot aluminum?

 

[samo_ott]

Re: How fast will it go

Faster than my 240# butt in a 12' tinny!

 

[Rick.]

Re: How fast will it go

With the right weight distribution probably you should expect around 17MPH. No matter it isn't really about speed with a 9.9 IMO. Glad to hear your liking it. They are great motors. Here is a good link for you to read. Best of luck. Rick.

http://www.sschapterpsa.com/ramblings/OMC/OMC info.htm

 

[CATransplant]

Re: How fast will it go

Hi all,

I am in love with my new to me 1974 9.9 Evinrude,much better at trolling than my old '79 Merc 7.5.
Any ideas on how fast this thing will go (top speed) with my 215lb butt in my 12 foot aluminum?

15-18 mph, depending on how the boat is set up, weight-wise. If you move the fuel tank and battery forward in the boat, you'll improve your speed. So will balancing the weight from side to side in the boat.

Trim on the engine will also change performance. Experiment with the tilt settings to find the best compromise for your goals.

It won't be a speed demon, but it'll get you from one fishing spot to the next in good time.

Hint: Try trolling from fishing spot to fishing spot. I've found new honey holes that way that nobody else knows about. Just sayin...

 

[kbait]

Re: How fast will it go

'74-'76 9.9/15hp's are identical except for carb bore diameter at the powerhead. Find a 15hp carb, and you'll scoot!

 

[tashasdaddy]

Re: How fast will it go

i hate these questions. there are too many "depends on".

 

[Bubbles Up]

Re: How fast will it go

Thanx all for your replies I know it was a bit of a question with so many variables. It is for insurance purposes as the require an estimated top speed, anything faster than 25MPH (40Km/H). then the insurance bracket jumps up.

It will primarily be used for trolling but still need to get to somewhere quickly like render assistance,get out of a storm etc etc.

The link that was posted is very helpful,it now is book marked.

 

[smoktire]

Re: How fast will it go

With my 85lbs ultra thin 12' with johnson 1989 9.9
9.5inch 10 pitch prop
200lbs butt
the gps say 42 km/h

 

[Rick.]

Re: How fast will it go

smoktire: What kind of GPS do you use that says KPH? Just kidding but that stuff is for the most part meaningless on this forum. Just say 24 mph and we will all understand. I would be interested to know, what is the slowest trolling seed you can maintain with that prop?

Bubbles Up: For insurance purposes, guesstimate low. LOL Rick.

 

[wbeaton]

Re: How fast will it go

I run my kickers on a 1979 12.3' deep and wide Springbok aluminium utility boat max rated for 12.5 hp. I get 31 kph / 19.3 mph with a 1985 Johnson 9.9 hp with a full gas tank and me +200 lbs.

 

[Bubbles Up]

Re: How fast will it go

Thanks to those that replied ,those are some good numbers to work with. Smoktire it sounds like you and I are running similar boats but my motor is a few years older!

'67 Springbok W/ '74 Evinrude 9.9

 

[Snobike Mike]

Re: How fast will it go

smoktire: What kind of GPS do you use that says KPH? Just kidding but that stuff is for the most part meaningless on this forum. Just say 24 mph and we will all understand. I would be interested to know, what is the slowest trolling seed you can maintain with that prop?

Bubbles Up: For insurance purposes, guesstimate low. LOL Rick.

42 kph is 26 mph. Seems pretty fast for a 9.9 even with a 10 pitch prop.

 

[Rick.]

Re: How fast will it go

I'm starting to think I need to loose some weight! I can't get that speed out of mine. Rick.

 

[wbeaton]

Re: How fast will it go

I'm starting to think I need to loose some weight! I can't get that speed out of mine. Rick.

Its not your weight, Rick. 26 mph is super fast for a 9.9 hp. They weren't rated to run that fast with the stock prop.

 

[mpsyamaha]

Re: How fast will it go

yeah that really is moving for a little 9.9...

 

[smoktire]

Re: How fast will it go

smoktire: What kind of GPS do you use that says KPH? Just kidding but that stuff is for the most part meaningless on this forum. Just say 24 mph and we will all understand. I would be interested to know, what is the slowest trolling seed you can maintain with that prop?

Bubbles Up: For insurance purposes, guesstimate low. LOL Rick.

Garmin...lol if i go upstream of the ottawa river at foward idle curent push me backward.

My rocket boat is a 1962 Harbercraft with a re inforced transom !!

The engine runs at 6200 rpm Fluke tested