Those motors are screamers on a light boat. My dad has a 1991 Evinrude 15 and it tops out at 27.7 mph at 6800 RPM on my 14' Lund with an 11" pitch 3 blade aluminum prop.
706jim - Yamaha just made a brand new 3.5 HP 2 stroke outboard motor that can be fitted onto the stock motor mount of those dangerously inexpensive Inflatable boats made by Intex, (They're literally 90 bucks and they can hold a 3.5 hp outboard) I imagine that setup with a small adult could yield speeds upwards of 25 mph aswell.. That would be a lot of fun to do get an intex 3 person inflatable and put a new 2017/2018 2 stroke motor with the highest allowed power rating on it and see how it copes
706jim Mind you I have no idea what I'm talking about, lol all I know is that this Yamaha Outboard I'm talking about looks like a trolling motor it's that small, and i know that on a 230 pound quad 3.5 horsepower would be enough to get maybe 35-40mph so imagine what a tiny 3.5 ho outboard on a 50lb inflatable would look like?
Except its not really a 15 hp I have one also a zuke 9.9 4 stroke and a yammy 15 2 stroke both faster then the johnny imo its a true 12/13 hp apparantly they measure hp in a different way back then
I've just been given a 2000 johnson 15hp 2 stroke that was put in a garage with less than 15 hours on it and a Has sat for approx 15 years. Will a simple carb cleaning and water pump be enough to get it going or is there more you would do?
Specs are 6500 a 7000 according to factory sale brochure from 1978. I know the top should be at 6500 but 300 more RPMs is not very significant difference.
I have a 1992 and the factory service manual for it. For the 1992 the WOT range is 5500-7000 rpms. On my 1648 it runs at 6900 rpms with an 8" pitch 3 blade aluminum prop and just me. Some other 80's models have a max rpm range of 6500. You have seen the video of my boat which is similar to yours if I remember right. 6300 is a good number though, the main thing is to not have it propped so it's lugging the motor.
My 1974 Johnson 15hp with the factory 10" prop does 37 KM/H with just me in my 12 alum boat, but lugs badly with two big people. 20km/h. I got a 7" prop, and it does 31 with me alone, but 24 with my passenger, which is a huge improvement when loaded. Hops up on plane and skips right along.
vojomatusenko There might be a possibility that the actual outboard is from '88, but with a top cover from an '86 on it. I used to own a 15hp from '86 for many years, and it looked exactly like this one. If you check the brochures from '87 and '88, you will see that the decals looks different than this.
WarthDader74 That may be possible, sure the hood looks like from my others 88 motors from the past, but I never looked at them too closely. you may be right and I may be wrong on this.
Dear Vojo, here is Henrique, from Brazil (the e-mail guy), thanks for this video ! You put a tach and save my day ! Thanks friend!
that thing runs great
Have one here in Alaska
On 19’ canoe
What gap are you running your spark plugs. Sounds a lot higher RPM than mine !
1985 15HP Seahorse
great video thanks for the rpm reference
Love them! My old Xp10 / 15hp still loads more power than my newer Mariner 15hp. So much grunt and best sounding 2t by far. 👌
Those motors are screamers on a light boat. My dad has a 1991 Evinrude 15 and it tops out at 27.7 mph at 6800 RPM on my 14' Lund with an 11" pitch 3 blade aluminum prop.
Certain models on them old evinrudes were designed to run at high rpms. The late 80s and early 90s are the ones to buy.
My 15 hp runs about 6300 and I didn't know if that would be ok for long term use?
As long as you are between 5500 and 6500 you ok for long term use.
is that outboard for sale, if so how much?
What propel/scrue did you have on the engine?
I still think these 15's have the best power to weight ratio of anything available today.
You are absolutely right.
706jim - Yamaha just made a brand new 3.5 HP 2 stroke outboard motor that can be fitted onto the stock motor mount of those dangerously inexpensive Inflatable boats made by Intex, (They're literally 90 bucks and they can hold a 3.5 hp outboard) I imagine that setup with a small adult could yield speeds upwards of 25 mph aswell.. That would be a lot of fun to do get an intex 3 person inflatable and put a new 2017/2018 2 stroke motor with the highest allowed power rating on it and see how it copes
706jim Mind you I have no idea what I'm talking about, lol all I know is that this Yamaha Outboard I'm talking about looks like a trolling motor it's that small, and i know that on a 230 pound quad 3.5 horsepower would be enough to get maybe 35-40mph so imagine what a tiny 3.5 ho outboard on a 50lb inflatable would look like?
Danny Murphy not a chance
Except its not really a 15 hp I have one also a zuke 9.9 4 stroke and a yammy 15 2 stroke both faster then the johnny imo its a true 12/13 hp apparantly they measure hp in a different way back then
high rpm with deflector piston's.. ;)
it's an old Johnson.. not a König
Nice boat.
I've just been given a 2000 johnson 15hp 2 stroke that was put in a garage with less than 15 hours on it and a
Has sat for approx 15 years. Will a simple carb cleaning and water pump be enough to get it going or is there more you would do?
That is all it will need, assuming all electronics are good.
@@vojomatusenko thank you for your time. Been watching alot of your videos so i trust your judgement
Sea Foam
Do you think these motors will be ok running that high rpm?
Specs are 6500 a 7000 according to factory sale brochure from 1978. I know the top should be at 6500 but 300 more RPMs is not very significant difference.
I have a 1992 and the factory service manual for it. For the 1992 the WOT range is 5500-7000 rpms. On my 1648 it runs at 6900 rpms with an 8" pitch 3 blade aluminum prop and just me. Some other 80's models have a max rpm range of 6500. You have seen the video of my boat which is similar to yours if I remember right. 6300 is a good number though, the main thing is to not have it propped so it's lugging the motor.
My 1974 Johnson 15hp with the factory 10" prop does 37 KM/H with just me in my 12 alum boat, but lugs badly with two big people. 20km/h.
I got a 7" prop, and it does 31 with me alone, but 24 with my passenger, which is a huge improvement when loaded. Hops up on plane and skips right along.
That is from 1986, the 1988 had different decals with more silver color on it.
We'll, according to model number it is 1988 and I think you are wrong.
vojomatusenko There might be a possibility that the actual outboard is from '88, but with a top cover from an '86 on it. I used to own a 15hp from '86 for many years, and it looked exactly like this one. If you check the brochures from '87 and '88, you will see that the decals looks different than this.
WarthDader74
That may be possible, sure the hood looks like from my others 88 motors from the past, but I never looked at them too closely. you may be right and I may be wrong on this.
@@vojomatusenko looks like a 89 or 90 to me, unless someone replaced the cab.
Who gives a shit
I'm running a 4 blade 9 pitch. at about 6300 rpm
what kind of tach is that and here can I get one?
Mini tach on eBay, $10 or $15.
thanks..
Nice
Good video. Check out my brand new 2017 15hp Suzuki on my channel. I just reviewed it.
RPM TO HIGH
Are any of these for sale?