I'm building a Bobber from a NV Autoped 117b 1956 and the only other engine based on the NV Autoped engine is the NV/crescent marin. This video answered alot of question i had. Thanks!👌🏻
I also. Two stokes are light, perfect for a bike. But there are no motorbike two strokes engines as big as 2 or 2.5 litre. I think the biggest ever made were 750cc. The 2 litre Mercury outboard weight is 185Kg including power trim. I wonder how much weight is just the motor.
Guess there are a few bikes which used a similar arrangement so could give some parts which maybe of use. Goldwing, the BMW flat twins, triples & fours plus the Guzzis. Very cool.
You know this guy has wrenched on a goldwing or two in his life lol thank you for addressing the carburetors. I was almost wondering if they were some type of diaphragm carb.
Just started watching this. Love the idea. Would the BMW motorcycle gearbox work maybe? Right way around and strong enough. Years ago a guy here in NZ put a 160 hp outboard motor into an Austin Mini...
Yes it does have a gravity fed oiling system, even with oil injection there are holes drilled so oil drips into them and to the bearings , change the orientation of the motor and theses holes don't face downward and the oil don't get to the rite places, oil injection does not do everything!
You are aware that this engine commonly came as a multi port fuel injection that would lower the upper height? It bolts right on. No need for carbs at all and my guess is it would be about 2" high if you moved the ECU. The Fi system is stand alone so it would be pretty simple, the only downside would be the fuel map but I don't think you'd care much about or notice that.
Capable of 200 HP as they used all the same power head. Tan wire is a temp sensor in some cases or an over heat switch in others, not a knock sensor. This engine will set a simple alarm via the module if it is over temp, the oil pump shaft stops turning or the oil in the small holding tank drops below the float level. You should keep this system. The thermostats are 143* F to stay below the precipitation point of salt water, otherwise you would have rapid creation of salt crystals. No idea where you could get hotter ones or if you would even want to. What are you going to do for a circulation pump? Electric I assume?
the first problem you're going to run into is the exhaust, it used to be water cooled then the next problem will be no transmission and no clutch and then the powerhead, those things only run at idle and full wide open throttle. its a compact highly powerful 2 cycle V6... a lot of people have tried a lot of tricks to get them to work in buggies and cars but they never work out and then they blow up
I always wondered about taking a rubber bumper mg, something a dime a dozen and light, and figuring out a way to put one of these big two strokes i could buy at the same junkyard.
@@malcolmoastler3039 well i live in the US. Im also a mechanic with access to a wonderful boss and shop full of fabrication tools. Rubber bumper MG cars are pretty common here in Arizona, we have no rust. None. People with yard oranament boats and such from the 80s with all the wonderful american 2 stroke outboards imaginable. We have a mill for an adapter plate. A grinder and welder for forced cooperation. We have a plethora of junkyard transmissions and rear ends to explode. I have more time and tool access than money.
The 1:2 reduction to make the propeller go at half speeds should serve well for a motorbike, using an engine that revs up to 6000 rpm. I see no reason to speed up reversing the original reduction because results are reaching up to 12,000 rpm, which seems to me really huge rpm. Final reduction on a motorcycle goes around 1:6 on fifth gear. Dropping from 6,000 rpm to 3,000 on the primarily chain or gear, to dropping again to 1,000 at the wheel using a 15 to 45 teeth reduction on the secondary chain. I see no object in speeding up up to 12,000 rpm and having to add a 1:12 reduction afterwards, adding transmission loses and risking reliability using an axle at 12,000 rpm.
Congratulations! A great idea, no doubt. Two stokes are light, perfect for a bike. But there are no motorbike two strokes engines as big as 2 or 2.5 litre. I think the biggest ever made were 750cc. The 2 litre Mercury outboard weight is 185Kg including power trim. I wonder how much weight is just the motor. The old Suzuki four stroke maximum power was maybe 100hp for a total weight that probably was more than 200Kg. The 2litre Mercury engines using 3 double carburettors, 6 in all, were 135, 150 and 175hp, with a huge amount of low end power, being two strokes. The new power with those two carburettors must be lower than 135hp, but the power to weight ratio should be still very high. How much weight is the whole bike now?
Why? You could use a 600cc bike motor that has the needed sequential gear box. It would be much lighter, and a turbo could easily exceed the 250hp level.
Why did you decide not placing the engine with the crankshaft perpendicular to the motion direction? I think that the Coriolis effect would make the bike work better on corners, on curves.
Back in my Redi-MIx concrete truck driving years, the drum with 40,000 lbs of wet concrete DEFINITELY had an effect on cornering. The drum spun clockwise on mix, from the drivers seat looking forward, and on left turns, the truck would turn like on rails with high drum speed, right turns it was very easy to get the right rear wheels off the ground, at slow speeds!
anything can be done, but that would be a huge challenge. I'm thinking oil system, drive off the crank, and ridding yourself of the motorbike clutch and gearbox
@@malcolmoastler3039 Ah very good I had wondered if it was firing two cylinders at once. I presume it's set up as a 180-pin offset then? 2nd question, have you considered designing/making an adapter for auto transmissions? perhaps with the provision for a thrust bearing? It might be a hoot to fit one of those outboard motors into an old Jeep or Toyota FJ/BJ Land Cruiser.
@@Inventionsmach no, but I see what you mean. The engine produces x torque at y revs to give z horsepower. I've used the driven gear as the drive gear, but it only sees the same engine torque, so half the tooth load. Ignoring losses, the hp will be the same on either shaft, but half the torque and twice the revs on my output shaft.
I wanna see this done with a 150hp tower of power 1500cc 150hp is better /han a 140hp 2000cc and the 150 can be tuned out to 225hp without to much work
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
“Anyone with a soul loves a two stroke” instant thumbs up
I'm 2 yrs late but you quickly got my full attention. Love 2 strokes and Merc engineers are pretty much the gods of their innovation.
man if you would build me a bike like this. I give you 10 years of my life - free help. Man I'm learning. I would have never thought about this..
With a nice set of expansion chambers that will be amazing
It takes a rare breed to even think of this. And im all in
This looks interesting. Looking forward to the gearbox casing being made.
I just had this idea, to build into a chopper, this is research gold
Nice. Stoked to find this, not much talk goes on around unique outboard engine use.
Working on a project myself 👍
I'm building a Bobber from a NV Autoped 117b 1956 and the only other engine based on the NV Autoped engine is the NV/crescent marin.
This video answered alot of question i had. Thanks!👌🏻
you're very welcome sir.
Brilliant, another epic build series to watch. Thankyou!
Bro I've been thinking about doing this since I found out there were v 4 6 and 8 two cycle configured outboards, you beat me to it
I also. Two stokes are light, perfect for a bike. But there are no motorbike two strokes engines as big as 2 or 2.5 litre. I think the biggest ever made were 750cc.
The 2 litre Mercury outboard weight is 185Kg including power trim. I wonder how much weight is just the motor.
Y'know, those exhaust 'nostrils' are crying out for a turbo housing . . . & yet, just enough sanity prevails : )
Feeling bored Malcolm? This is going to be awesome!!!!!!
Guess there are a few bikes which used a similar arrangement so could give some parts which maybe of use. Goldwing, the BMW flat twins, triples & fours plus the Guzzis. Very cool.
Can't wait to see how it comes out!!
You know this guy has wrenched on a goldwing or two in his life lol thank you for addressing the carburetors. I was almost wondering if they were some type of diaphragm carb.
Hi Malcolm, great project, I have a 30 year old digital speedo which might still work ;)
details?
@@petehome4749 very good, but give me another clue as to which pete you are?
Just started watching this. Love the idea. Would the BMW motorcycle gearbox work maybe? Right way around and strong enough.
Years ago a guy here in NZ put a 160 hp outboard motor into an Austin Mini...
Yes it does have a gravity fed oiling system, even with oil injection there are holes drilled so oil drips into them and to the bearings , change the orientation of the motor and theses holes don't face downward and the oil don't get to the rite places, oil injection does not do everything!
It's true: everyone with a soul loves a two-stroke. 😁
Two years late to your video, but could use a BMW shaft drive unit with its gearbox. Mount it longitudinally like a K75 or K100 engine
yes, great idea. Have a youtube at Rat Cafe V8 bike, and enjoy
You are aware that this engine commonly came as a multi port fuel injection that would lower the upper height? It bolts right on. No need for carbs at all and my guess is it would be about 2" high if you moved the ECU. The Fi system is stand alone so it would be pretty simple, the only downside would be the fuel map but I don't think you'd care much about or notice that.
ahh man I love it , this has been on my mind for years , so bad ass
I'm trying to figure out how to get an 86 yamaha v6 200 outboard in my 86 samurai. Nice video
This needs more views, so here's a comment for the allmighty algorithm.
Well-done mate I was always wondering if it could be done
You are reading all gear heads minds man👍
thanks mate. getting close now
Capable of 200 HP as they used all the same power head. Tan wire is a temp sensor in some cases or an over heat switch in others, not a knock sensor. This engine will set a simple alarm via the module if it is over temp, the oil pump shaft stops turning or the oil in the small holding tank drops below the float level. You should keep this system. The thermostats are 143* F to stay below the precipitation point of salt water, otherwise you would have rapid creation of salt crystals. No idea where you could get hotter ones or if you would even want to. What are you going to do for a circulation pump? Electric I assume?
the first problem you're going to run into is the exhaust, it used to be water cooled then the next problem will be no transmission and no clutch and then the powerhead, those things only run at idle and full wide open throttle. its a compact highly powerful 2 cycle V6... a lot of people have tried a lot of tricks to get them to work in buggies and cars but they never work out and then they blow up
thank you for your sage comments. you'll be relieved to know that I've been riding it on the road for a few months now, and it's fine.
@@malcolmoastler3039 racist
@@dirttdude I'm sorry. What do you mean?
@@malcolmoastler3039 i assume that you are racing it....
@@malcolmoastler3039 Video when? :D
I'll bet it's going to be real torquey.
and you'd be right mate
I always wondered about taking a rubber bumper mg, something a dime a dozen and light, and figuring out a way to put one of these big two strokes i could buy at the same junkyard.
tricky project. how about a rover v8?
@@malcolmoastler3039 well i live in the US.
Im also a mechanic with access to a wonderful boss and shop full of fabrication tools.
Rubber bumper MG cars are pretty common here in Arizona, we have no rust. None. People with yard oranament boats and such from the 80s with all the wonderful american 2 stroke outboards imaginable.
We have a mill for an adapter plate. A grinder and welder for forced cooperation. We have a plethora of junkyard transmissions and rear ends to explode. I have more time and tool access than money.
@@dylanmccallister1888 sounds like a recipe for smiles 😃....from Wyoming USA 🇺🇸 🤠
I hope you’re still working on the bike.
If you use the outboard's own gearbox, you can go 200 kph forward and reverse
All very matter of fact, when you know what you're doing.
Why not use a honda goldwing transmission?
Not a new idea the late Kim newcombe did it with a konig back in the early 70s and won gp races back in the day
The 1:2 reduction to make the propeller go at half speeds should serve well for a motorbike, using an engine that revs up to 6000 rpm.
I see no reason to speed up reversing the original reduction because results are reaching up to 12,000 rpm, which seems to me really huge rpm.
Final reduction on a motorcycle goes around 1:6 on fifth gear. Dropping from 6,000 rpm to 3,000 on the primarily chain or gear, to dropping again to 1,000 at the wheel using a 15 to 45 teeth reduction on the secondary chain. I see no object in speeding up up to 12,000 rpm and having to add a 1:12 reduction afterwards, adding transmission loses and risking reliability using an axle at 12,000 rpm.
I would love a v8 one to put in a car i live in the UK and never seen any :(😢
have a youtube at Rat Cafe V8 bike. 4 stroke, but V8
My mind keep picturing that motor on a total savage trike bike. Make it quiet as possible so nobody sees the sleeper coming
Congratulations! A great idea, no doubt.
Two stokes are light, perfect for a bike. But there are no motorbike two strokes engines as big as 2 or 2.5 litre. I think the biggest ever made were 750cc.
The 2 litre Mercury outboard weight is 185Kg including power trim. I wonder how much weight is just the motor.
The old Suzuki four stroke maximum power was maybe 100hp for a total weight that probably was more than 200Kg. The 2litre Mercury engines using 3 double carburettors, 6 in all, were 135, 150 and 175hp, with a huge amount of low end power, being two strokes. The new power with those two carburettors must be lower than 135hp, but the power to weight ratio should be still very high.
How much weight is the whole bike now?
haven't weighed it, but certainly less than 300kg
Why? You could use a 600cc bike motor that has the needed sequential gear box. It would be much lighter, and a turbo could easily exceed the 250hp level.
Why? Because he can!
And, he was successful!
Why did you decide not placing the engine with the crankshaft perpendicular to the motion direction?
I think that the Coriolis effect would make the bike work better on corners, on curves.
Back in my Redi-MIx concrete truck driving years, the drum with 40,000 lbs of wet concrete DEFINITELY had an effect on cornering. The drum spun clockwise on mix, from the drivers seat looking forward, and on left turns, the truck would turn like on rails with high drum speed, right turns it was very easy to get the right rear wheels off the ground, at slow speeds!
Very cool. I wanted to do the opposite, put a sport bike engine in an outboard, do you think that could work?
anything can be done, but that would be a huge challenge. I'm thinking oil system, drive off the crank, and ridding yourself of the motorbike clutch and gearbox
I wonder if exhaust cooling is necessary. Could a ceramic coating be applied to the inner surfaces?
good idea. Can't really do the block, but the exhaust port cover can be done and will be a great help, thanks
Maybe into a Shaft Drive Bike frame.
yes, indeed, go right ahead
Have you finished the work after the the housing for the chain pully?
yeah, slow progress, stay tuned
Interesting project
st1100 gearbox would be a good fit..
Malcolm, how much does the power head weigh?
I don't know, but it's not light. I would guess about 60 or 70kg.
what is the bank angle on that power head?
60 degrees. the crank has 6 different pin angles
@@malcolmoastler3039 Ah very good I had wondered if it was firing two cylinders at once. I presume it's set up as a 180-pin offset then?
2nd question, have you considered designing/making an adapter for auto transmissions? perhaps with the provision for a thrust bearing? It might be a hoot to fit one of those outboard motors into an old Jeep or Toyota FJ/BJ Land Cruiser.
@@2000freefuel sorry mate, can't remember, but i think it is set up to fire evenly
how it going with the torque implse?
can you expand on your question please?
@@malcolmoastler3039 torque is related to rpm, x hp, will reversing the gearing increase the torque, over the shaft,. over tolerance.
@@Inventionsmach no, but I see what you mean. The engine produces x torque at y revs to give z horsepower. I've used the driven gear as the drive gear, but it only sees the same engine torque, so half the tooth load. Ignoring losses, the hp will be the same on either shaft, but half the torque and twice the revs on my output shaft.
@@malcolmoastler3039 CORRECT
I wanna see this done with a 150hp tower of power 1500cc 150hp is better /han a 140hp 2000cc and the 150 can be tuned out to 225hp without to much work
nice!
I'm late to the party