Yamaha 90 hp 2 stroke Outboard WOT ( Wide Open Throttle ) 4 blade prop
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- Опубліковано 27 сер 2014
- 3 cylinder 2 stroke Part1 Full Throttle @ WOT . Full Trim,no "cavitation"/ventilation 37.5 knots at 5300 Rpm. ( I need a Jack Plate )
Full Throttle @ WOT,,,LOWER TILT 35 knots. Rpm, I don't recall
Yamaha Specs Recommended Min-Max RPM 4500-5500 @ WOT
for this 90 HP! I have a 70 hp 2 stroke Yamaha and it has Recommended Min-Max 5000-6000 RPM. More info further down why it is Important.
"Conventional" Loop Charged 2 stroke carburated outboard
1140cc 90 hp lightweight " 121kg " outboard engine.
Propeller, 4 Blade Original Yamaha, 13 1/4 x 18 =Very good grip in the water and planes at 2600 rpm!
It would have been impossible with a 3 blade ; )
It may go faster with a 3 blade prop but i don't think it would be that much more ,and i would lose all the benefits the 4 blade brings
One "custom modification" ...
Drilled new holes for the mounting so high that the holes for the bolts are 1.5 cm from the top of the transom
And the engine sits in the 4th hole.
Higher up is impossible without a Jack Plate.
Yamaha has four holes to mount bolts in,
If you mount the motor on the lowest holes,,,the higher up the engine will be........obviously : ) .
Lift up your outboard 1 or 2 holes
even if you drive with an aluminum propeller, it will go much easier in the water, the less rig you have in the water = the less drag
And you save fuel because of lower drag
And maybe get more speed out of the boat.
Why slow down the boat unnecessarily with a low-mounted outboard.
If you mount your rig too high The Aluminium Propeller will start to ventilate (take in air ) you can hear this clearly,
Lower the outboard one hole and test again,
Or try a Stainless prop with the same pitch.
And I can assure you that it will not ventilate (losing grip in the water).
Maybe you can raise the engine further without the propeller loses its grip.Higher Performance!!
If you have lets say a 19" Aluminium prop on And replace it with a 19" Stainless Steel , It will drop the rpm at WOT ( Full throttle ) and lose performance.
Because the 19"ss is more "aggressive"( the most ss are ) then the Alu dito
If you are going to have the engine at the same hight rpm try a 17"
If it still have lower rpm at wot,Elevate the outboard
Propeller Calculator
continuouswave.com/cgi-bin/pro...
Important !
You must also remember not to go below or above the recommended RPM range at wide open throtte for your outboard.
Find out in the specifications for your outboard.
Warning !
Do not forget the cooling water intake, if you raise the engine above the intake, the engine can overheat.
But there are solutions for this also.
There is so much to say on this topic, so check out more on the web to learn more about Propellers.
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That's why I want my outboard higher up.
It does not loose the grip even at full tilt (Trim) and make 5300rpm
I want to reach 5500 rpm (Maximum recommended RPM) for this Yamaha 90 hp 2 stroke.
Since its not ventilate at the highest trim, It could probably be raised further with a Jack Plate - Розваги
One of the if not THE best engines of all times
I just got a Key west 1720 with one of these, I'm coming from a 26ft CC and I was impressed with how this motor ran, was super fast to
Three cylinders and two stroke, this is how an outboard should sound.
That motor sound / trim adjustment is childhood memory city for me. We had a few of them. Practical was a 40 hp on a pontoon boat. Fun was my uncle's 90 hp on a 13' fiberglass shell (no decking/bow covering - just the boat, some fiberglass bucket seats with boat cushions in them and some cut foam, and a rudimentary dash).
just bought a 06 90. The man had it garage kept, but kept it well maintained. Very pleased with my purchase. It's a beast!
i bought a 30 hp suzuki 2 stroke last year and it sanked in saltwater from a bad storm i rinse it all day with water and dry it put some new spark plugs and that´s it it ran like brand new still i love it
The motor spays like a boss
Thanks for the video getting me excited for mine 👍
For just a 90 HP motor that thing SCREAMS!!!!!
Very well setup boat.
cool video
A beast
sound love
Great Sound, I have a 2001 2 stroke 3 cylinder 90h. can only reach 5000 rpm SOMETIMES.. haha
If that motor is running properly, then your prop needs to be tweaked. Reducing the pitch will add RPM's.
Got the same motor and I love the rooster tails it makes
connor craw-reid. My 250 would make. A bigger one than your 90
bass fishing pro your 250 would blow before this old powerhouse
That boys a running fool
Old school 👌
It pretty cool that this single 90 hp can run trough the water that fast,
may i ask waht is tonage of your Boat for this 90 hp engine and how efficient the fuel consumption is?
Great little motors, mine finally gave up and replaced it with a mercury 90 4stroke, definitely not as fast now
what happened to it if you don't mind me asking
@@michaelvenners8626 internal corrosion
Should've just grabbed a new powerhead and tossed it in there.
@@MRMIKE276 yea I wish I would have
When I popped a piston in mine, I toyed with the idea of getting a new motor. Alas, there isn't another 90hp motor out there that comes close to the weight of the old Yamaha 2 stroke 90's. Just had mine rebuilt and absolutely no regrets. Love this motor.
Up there with my 8hp Parsun
😍😍😍
🔥🔥
Красава
J’aime beaucoup cette vidéo. J’ai le même moteur sur un bateau plus long .
Je veut essayer aussi une 4 pales !
J’ai une hélice Michigan Ballistic 13 x 15 je suis à 5300 rpm pour 34 noeuds .
Vous préférez le 4 pales ??
I got a 16.5 ft deepv center console with an F115 outboard, aluminium propeller 19 pitch original Yamaha. It goes 40 knots at 6300 rpm at full trim. It is mounted at the second lowest position. Motor has 5300-6300 wot range, feels fast but I think the last 400 rpms don't bring much speed. Should I go SS 19 inch?
42 knots = 46.354 mph
Which fletcher hull is the engine on ? 75hp 85hp 90 hp yamaha same engine difference carbs and tubes very thirsty motor three carbs v 4 115 has a lot more power and cheaper to Run! As has two carbs Etec are the way to go now
Thanks for the info 👍
The 90 Yamaha has only 70 cubes but run strong!
DYNO DON Yes , And when you have light boat, you do not require more than a 1140cc compact lightweight 121 Kilo outboard ; )
Es muy rápido.kiero uno de esos .perfecto
What size prop pitch and size mate I have the same
46 mph on an 1100 lb hull. Nice
Beautiful sounding motor! Does the Yamaha 85 sound the same?
I have a Yamaha 85 but it's a slightly older model and it sounds more gnarley and 2 stroke like
@@jackmullen9114 Well shit now you gotta upload a video of it!
Best engine I had... 6k rpm on a 20" propeller.... what a beast
What was it on and speed musta been 50ish
nice motor! :)
at full throttle modfiy the tilt?@1:25
its called getting on plane :)
No it's called powertrim
what is the maximum speed
Woww
Same angine on a yamarin 5120, I have a solas 13,5x17" aluminium but at my wot I can only reach 33 knots @4900, marsch speed at 26 knots with 4000rpm. Definitely not a good combo and I can hear that the engine is working a little bit too much, not easy to plan. Any suggestion? I still have to test a mercury 13x16 ss i have but I want a yamaha ss on next.
Good question
I have to same combo and mine just revs to 4500 not much top end
Lift up your engine as high as possible on the transom ( new holes may be needed higher up for that ) Or use the simplest application to get that motor up,,after that,,test your 16” SS or a 15”SS
Lift up your engine as high as possible on the transom ( new holes may be needed higher up for that ) Or use the simplest application to get that motor up,,after that,,test a 15” Stainless Steel prop
Dude May i ask What is the tonage of your boat on that 90 hp ?my boat is 1400 lb and im short of budget to get the 300 hp
Thats why im choosing between a single 300 hp or a twin 90 hp engine.
How long can you go WOT without damaging the engine?
I have drilled the holes for the engine as high as it will go on the boat.
I think I need a jack plate of any kind, do you have any tips what is best.
Do you have a video of the lower section of the motor running in the water, that would be the only way I can tell (not an expert lol)
Venomous villain Yes,here you can se the anti ventilation plate above the waterline.
ua-cam.com/users/edit?o=U&video_id=VdBZWkBlhkQ
ua-cam.com/users/my_videos_annotate?v=bGfi_QQ0yAY
ua-cam.com/users/edit?o=U&video_id=eNPe0sditgQ
This video is not what you asked for,,this is a "Run in the night" at late evening video ...
ua-cam.com/users/edit?o=U&video_id=z1TE_4Tmm8s
330da. Jack plate 4 blade prop
Do you put the same oil in the oil take as the in the mix oil gas mix
Triboron injection 2-stroke oil, in the Autolube only.
Triboron bränsleförstärkare ( fuel amplifier ) in the fuel tank.
0:33 Engine Roar!
I got 2006 Yamaha 90hp on my 98 pro craft bass boat it runs 45 easy at 5000 rpm with the right prop it should be in the 50s
no 90 hp will ever get in the 50's unless it is pushing a very light boat,,and 45 ,,lol,,the specs for a 90 hp tops is 42 mph on a 800lb boat
What is the propeller size and boat
What is the difference in fuel consumption between yamaha 90 and 70?Nice vid.
70hp-At WOT ca. 20-24 liter/hour,,,
,,,c.a 30-34/h on the 90hp.
At lower rpm, they come very close to each other in fuel consumption..
@@330da only 30-34? I think that consumption for Yamaha 4stroke is 30- 34 per hour...
What kind of prop?
Consumption??
Top speed?
I think you should have trimmed her in to take advantage of that trust you lost to the atmosphere. If you couldn't square her up, get a smaller pitch or circumference to get that done, you have to fire it as square as possible mate or its wasted. I don't think you've tuned your boat to that four blade enough. You have miles of testing to go, and it can do much better. Square up the drive, pull near max rpm and you've done your job.
What rpm is wot? Sounds great btw!!
5300 rpm
What pitch prop
What prop you running man?
4-blade 18” pitch
Yamaha - Performance Series 4-Blade… … 13 1/4 X 18
Need to play with trim to much, do you have hydrofins on it ???
On what boat is this and what prop do you have diameter (*) pitch (*) because i have a 90hp hond 4 stroke 6000rpm eith a joker 470 coaster
Hi,
Please look in to the description below the video : )
Boat: 500 kilo Yamarin 5010s....model 2005... the following year Yamarin renamed the boat to Yamarin 50sc and 50scs.
The difference between them is that the 5010s ( 50scs ) have a L formed seat in the front and a fold up- down table that the 50sc do not have.
What size is this boat my 170cc seapro tops out at 38
4.95 meter, 500 kg.
Yamarin 50sc ( 5010s )
Im looking at a boat with this motor, can I ask you how the fuel economy is?
3-4 mpg
Wot prox 32 liters/hour.
Cruise speed prox 15
@@330da how much if it was on a super light jon boat
What size boat is this
4.95 meters long,,,2.04 width,,,,, boat-500kg,,,105kg-outboard...
0:33
My brother has a Johnson 88 which he said was 90 hp. He put it on a 15 and a half ft bass boat..it will only run around 35mph..doesn't seem right after watching this..
Hi,
What rpm does he get on wot=full throttle?
That's what I'm saying to. 06 60hp 2 stroke 17 aluminum on a 15'11 custom all weld 86 aluminum bass boat and only get 37mph on a calm day. Thinking I need to go up a hole. And it doesn't have a rooster tail when I trim up. Just starts porpusing
change the prop to a 19 pitch
Why did you run a 4 blade instead of 3? How fast can you run?
At the time , a cruise speed prop was needed ( 19-20 knots @ 2700rpm )
Have a good day!
What name of prop and size please?
And lighter than the omc. 90s
take the autolube off and run it as pre mix 50:1, as the autolube pump can and will fail
What about the boat? Length and weight
Ulaş...
...500 kg Yamarin 5010s ( 50scs ).
4.95 meters long.
E39 m5
Isit hart strarting when cool
Not unless you got a 250 sho vmax 4 stroke fire right up
Question.. prop 4 blade what brand
Original Yamaha.
d3d71ba2asa5oz.cloudfront.net/32001340/images/performance4.jpg
www.crowleymarine.com/parts/452215.cfm#452215
It was running so well. Can’t believe it stalled at 3:50 🤦♂️
He shut it off
@@sethh1577 yep that's what happened
The price of this engine is several dollars
You are pitching it a liiiiiiiitle too high. Upwardspray means not all power is dissipated into the water.
At the time i was using a,, Four Blade 13-1/4 x 18” pitch Propeller.
The Stern Lifting Four Blade prop @ w.o.t + the high trim you can see in the video ,, got the 500kg Yamarin boat the highest speeds.
The bow lift wasn’t there b. o. the oversized 18” four blade stern lifter.
With this Boat and engine, i compromised Cruise speed over top end speed. Cruising 19 knots @ 2700rpm.
With this carefully selected stern lifting 4-blade prop,the application has the best of two worlds.
All the power are perfectly in the water.
If you’re thinking of a random 3-blade prop,,then maybe you could be right.
Have a nice day.
: )
330 dA
What speed was the top speed in this video with this 90 Yamaha
?
Hi,
Please read the description below the video.
Have a nice day!
Best regards,
from 🇸🇪
Top Class you are ...
you got that engine trimmed way to high ,all the thrust is coming out of the water
who told you a 4 blade was for fishing,,lol,,that is funny,,a 4 blade is for fast out of the hole but looses 3 to 4 mph on top end ,a 3 blade is slower from take off but is 3 to 4 mph faster than the 4 blade ,,I know this because I put them both to the test ,,so instead of a jack plate just change to a 19 pitch 3 lade and it will give you at least 4 mph more on top end ,,and trim it down a little more on WOT ,you loose forward thrust when you make a rooster tail,learn the proper trim
Trimed up to high