Good comparison, Also I got 2 40hp Johnson both 1991 models put 1 on 1985 17ft basstracker tiller with 60hp carb.,17p.get 35mph.the other one put on 1974 14ft crestliner firberglass 17p. get 36 mph.both have aluminum prop. get 4 to 9 mpg
@@publicdefender77 putting the larger 1.5'' venturi carbs on a 40hp is not smart as the intake manifold, reed stops and cylinder head are also different. it will make it idle too high and most likely run slower. simple 2 stroke common sense more fuel and air with nowhere to go. also the 60hp had chamfers in the exhaust ports.
@@Wisconsinsportsman once again no. what would the point be if you havent touched the reeds, intake, and cylinder head? if you did those easy and cheap things, then yes you would officially have a 50. just remember a 50 only helps you after around 4500-5000 rpm. under that a 40hp is just as strong.
@@publicdefender77I'm using 1985 60hp Evinrude carb 2 cylinder or a 50hp carb. It about the same, went use the 40hp the best I got is 30mph.I use 60hp two to four times a week for 2 years now, power trim,no vro I Love it, start every time
I have a 1950s Aerocraft v hull 14 foot with a 1993 25 hp Mercury. It runs 25mph with my wife and 10 year old on board. Not sure why your boat runs the same speed with 30/35 hp. Mine is stick steer so I am near the front.
@grant31781 These both are very heavy boats. Full wood floors, live well, 2 trolling motors and I'm heavy. Weight difference is my guess. Those stick steers are pretty slick.
@@publicdefender77 Must be the weight. My boat is light. Lithium trolling battery. Mower starting battery. Minimum thin wood flooring to level the bottom.
@grant31781 unfortunately these heavy boats draw so much water and that's one reason I sometimes prefer to fish out of my smaller 14 foot. As fast as the 40hp with the 25. ua-cam.com/video/zeppMNEVzGg/v-deo.html
1984 35hp and 1985 (and newer) 30hp OMC motors are NOT the same. While it is true that the OMC began to rate motors at the prop shaft in 1985 per the ICOMIA 28-83 standard (vs. the flywheel) OMC also dropped the engine block machining process for the 35 at the same time. A 1984 and earlier 35hp had a "bridge-port" block, whereas the 30hp had a "finger-port" block. The raw casting between the two may have been the same, but the machining was not. If you research the power produced by these motors using the ICOMIA standard, you will see the following for power produced: 20hp = 14.9 kW; 25hp = 18.7 kW; 30hp = 22.4kW; 35hp (1984) = 26.4 kW. After 1984 the bridge-port block was dropped and the 25 and 30 shared the same block - not the same block as the 35 had (1984 and earlier). The bridge-port block made a noticeable increase in power, which was especially true with a "loaded" boat. AFTER 1984 OMC still showed a 35hp in some literature (parts books, some owner manuals - although I have never seen an actual 1985 35hp), but the power rating of the 35hp and 30hp in that literature were the same, to wit: 22.4kW, probably because they shared the same block machining, i.e., no bridge-port block in either. For whatever reason, a 1985 35hp was never shown in sales literature and U.S. dealers did not have them. It has long been a belief that the 1985 30hp and the 1984 35hp are the same. They are not. Please do not perpetuate a false belief.
It very important to put things in their TRUE perspective ! What I am speaking of is TRUTH ! Matter not what some organization says ! ICOMIA who are they ? Who pays them ! ICOMIA does not define what a housepower is ! Horsepower is Horsepower ! Matters not if it heavy industry or in your outboard engine ! If truth was truth ! Both would be the same ! Sadly with a ICOMIA defining what is basic physics ! The Truth becomes somewhat elusive. What idiot would subscribe to some organization paid for by recreational boating industry located here in the united states ! To tell him what a horsepower even is and where it should be measured ? 1 horsepower is equivalent to 745 watts matters not where or how ! This all I am speaking of is ancient unimportant history ! OMC is a relic of history ! He could not compete in the modern world ! Forever gone ! The real reason I think many american companies are gone is a lack of ability to compete ! Rather than innovation ! They would rather support a organization that amounts to lobbyists and advertisers ! And still build machines that operating technology started in the 1950s One thing for certain at this point Your engine if a mainstream and noy made in china knockoff ! Is made in japan ! I have to add this :) We were in a world where two identical engines would have different covers one would say johnson one would say evinrude ! OMC never made it clear to the consumer ! Idiots would fight over rather his Johnson was better than your evinrude ! The engine that changed the world here in south louisiana was the mid 1980s mariner 40 ! Those would run like a scalded ape and run a awful long time ! With crawfishermen outboards were consumable tools. If they made one season they were happy ! Those mariner 40s really honestly changed what people here thought about outboard engines !
@mikedurhan9941 thank you for that information. I did not know that and i appreciate the correction. So you are saying the 84 35 Bridgeport block had better torque than an 85 30? Just curious how they would line up if I had an 84 35 vs an 85 30. Would I see any noticeable difference in any category.
@@publicdefender77 Yes, in my opinion, you would see - actually "feel" - a difference - especially in a boat that was not running light" For many years I had a 1984 35 and a 1986 30hp. I'd run both on the same boat at different times. If I was the only person in the boat there was a little difference - not much, however. But, if there were two grown adults in the boat, it would keep right on going with the 35hp, whereas with the 30hp, the additional weight would slow the boat down a bit. Another instance: I was an OMC/Bombardier dealer for several years. We had a customer who duck hunted, meaning lots of gear, guns, ammo, dog and another person. He finally wore out his 1977 Evinrude 35 and bought a new 2003 30hp. (He wanted a 35hp but we explained they were no longer available.) He came back in after using his new 30hp and complained about it not performing like his old 35 did. I love both motors, but there is a difference.
@mikedurhan9941 Yea, now that you say that, I can see the difference. I had a 1999 johnson 30 and that 84 35 Longshaft from that video did seem to move more weight better than the 30 would. Different boats but I can understand it better now. I really appreciate the information! Thanks for the lesson!
In about the mid 1980s everything outboard really started to change change ! In about the mid 1980s japanese were really showing up american brands ! So bad in fact that a fella might be running a japanese even though he might think his engine was American Made ! 1 horse power is 745 watts ! Thing is it was a bit more than propshaft horsepower ! The thing is the japanese engines were more modern and enjoyed a much higher Volumetric efficiency ! Before the mid 1980s OMC and mercury were still building that were started in the 1950s ! One of the most popular engines here was the 4 cylinder Merc 50 Anyway :) The american outboard manufacturers could not handle the competition ! It mattered not what it said on the cover ! Your engine was japanese ! It was a bit more to the story than just a measurment of measuring HP at the prop !
the 40hp in this video was 1989-newer. looks around 1993. by 1986 all manufacturers switched from powerhead to prop shaft hp. some started as early as 1983 depending on model. its not that they couldnt handle the competition OMC and Mercury made motors just as fast as the Japanese and many cases faster. but the Japanese definitely got them on refinement and easy to service tech for sure, especially making every motor loop charged (suzuki and yamaha) from the get go.
Growing up my brother had a 40 yamaha tiller style on a 14×42 flat bottom... Used to take it out in the coastal bays of Louisiana... good times..
I love the tillers!
I bet that ripped!
Good comparison, Also I got 2 40hp Johnson both 1991 models put 1 on 1985 17ft basstracker tiller with 60hp carb.,17p.get 35mph.the other one put on 1974 14ft crestliner firberglass 17p. get 36 mph.both have aluminum prop. get 4 to 9 mpg
@saodykol what year 60hp carb are you using? I'm VRO is still hooked up working great. Once I go to premix I want to throw a larger carb on.
@@publicdefender77 putting the larger 1.5'' venturi carbs on a 40hp is not smart as the intake manifold, reed stops and cylinder head are also different. it will make it idle too high and most likely run slower. simple 2 stroke common sense more fuel and air with nowhere to go. also the 60hp had chamfers in the exhaust ports.
@ct1762 can't you put 50hp carbs on a 40 and get more out of it?
@@Wisconsinsportsman once again no. what would the point be if you havent touched the reeds, intake, and cylinder head? if you did those easy and cheap things, then yes you would officially have a 50. just remember a 50 only helps you after around 4500-5000 rpm. under that a 40hp is just as strong.
@@publicdefender77I'm using 1985 60hp Evinrude carb 2 cylinder or a 50hp carb. It about the same, went use the 40hp the best I got is 30mph.I use 60hp two to four times a week for 2 years now, power trim,no vro I Love it, start every time
I have a 1950s Aerocraft v hull 14 foot with a 1993 25 hp Mercury. It runs 25mph with my wife and 10 year old on board. Not sure why your boat runs the same speed with 30/35 hp. Mine is stick steer so I am near the front.
@grant31781 These both are very heavy boats. Full wood floors, live well, 2 trolling motors and I'm heavy. Weight difference is my guess. Those stick steers are pretty slick.
@@publicdefender77 Must be the weight. My boat is light. Lithium trolling battery. Mower starting battery. Minimum thin wood flooring to level the bottom.
@grant31781 unfortunately these heavy boats draw so much water and that's one reason I sometimes prefer to fish out of my smaller 14 foot. As fast as the 40hp with the 25.
ua-cam.com/video/zeppMNEVzGg/v-deo.html
1984 35hp and 1985 (and newer) 30hp OMC motors are NOT the same. While it is true that the OMC began to rate motors at the prop shaft in 1985 per the ICOMIA 28-83 standard (vs. the flywheel) OMC also dropped the engine block machining process for the 35 at the same time. A 1984 and earlier 35hp had a "bridge-port" block, whereas the 30hp had a "finger-port" block. The raw casting between the two may have been the same, but the machining was not. If you research the power produced by these motors using the ICOMIA standard, you will see the following for power produced: 20hp = 14.9 kW; 25hp = 18.7 kW; 30hp = 22.4kW; 35hp (1984) = 26.4 kW. After 1984 the bridge-port block was dropped and the 25 and 30 shared the same block - not the same block as the 35 had (1984 and earlier). The bridge-port block made a noticeable increase in power, which was especially true with a "loaded" boat.
AFTER 1984 OMC still showed a 35hp in some literature (parts books, some owner manuals - although I have never seen an actual 1985 35hp), but the power rating of the 35hp and 30hp in that literature were the same, to wit: 22.4kW, probably because they shared the same block machining, i.e., no bridge-port block in either. For whatever reason, a 1985 35hp was never shown in sales literature and U.S. dealers did not have them. It has long been a belief that the 1985 30hp and the 1984 35hp are the same. They are not. Please do not perpetuate a false belief.
It very important to put things in their TRUE perspective !
What I am speaking of is TRUTH !
Matter not what some organization says !
ICOMIA who are they ? Who pays them !
ICOMIA does not define what a housepower is !
Horsepower is Horsepower ! Matters not if it heavy industry or in your outboard engine !
If truth was truth ! Both would be the same !
Sadly with a ICOMIA defining what is basic physics !
The Truth becomes somewhat elusive.
What idiot would subscribe to some organization paid for by recreational boating industry located here in the united states !
To tell him what a horsepower even is and where it should be measured ?
1 horsepower is equivalent to 745 watts matters not where or how !
This all I am speaking of is ancient unimportant history !
OMC is a relic of history ! He could not compete in the modern world !
Forever gone !
The real reason I think many american companies are gone is a lack of ability to compete !
Rather than innovation !
They would rather support a organization that amounts to lobbyists and advertisers !
And still build machines that operating technology started in the 1950s
One thing for certain at this point
Your engine if a mainstream and noy made in china knockoff !
Is made in japan !
I have to add this :) We were in a world where two identical engines would have different covers one would say johnson one would say evinrude !
OMC never made it clear to the consumer !
Idiots would fight over rather his Johnson was better than your evinrude !
The engine that changed the world here in south louisiana was the mid 1980s mariner 40 !
Those would run like a scalded ape and run a awful long time !
With crawfishermen outboards were consumable tools.
If they made one season they were happy !
Those mariner 40s really honestly changed what people here thought about outboard engines !
@mikedurhan9941 thank you for that information. I did not know that and i appreciate the correction. So you are saying the 84 35 Bridgeport block had better torque than an 85 30? Just curious how they would line up if I had an 84 35 vs an 85 30. Would I see any noticeable difference in any category.
@@publicdefender77 Yes, in my opinion, you would see - actually "feel" - a difference - especially in a boat that was not running light" For many years I had a 1984 35 and a 1986 30hp. I'd run both on the same boat at different times. If I was the only person in the boat there was a little difference - not much, however. But, if there were two grown adults in the boat, it would keep right on going with the 35hp, whereas with the 30hp, the additional weight would slow the boat down a bit.
Another instance: I was an OMC/Bombardier dealer for several years. We had a customer who duck hunted, meaning lots of gear, guns, ammo, dog and another person. He finally wore out his 1977 Evinrude 35 and bought a new 2003 30hp. (He wanted a 35hp but we explained they were no longer available.) He came back in after using his new 30hp and complained about it not performing like his old 35 did. I love both motors, but there is a difference.
@mikedurhan9941 Yea, now that you say that, I can see the difference. I had a 1999 johnson 30 and that 84 35 Longshaft from that video did seem to move more weight better than the 30 would. Different boats but I can understand it better now. I really appreciate the information! Thanks for the lesson!
@@publicdefender77 You are very welcome. I love your 1984 35hp. And thank you for the video.
Hope the gas was non ethanol
@DustinKeating-yk3vq haven't run any ethanol ever. The boats, sleds and atv is all straight.
Try to lift the motor on the transom up a bit. Like an inch or so! 40hp
In about the mid 1980s everything outboard really started to change change !
In about the mid 1980s japanese were really showing up american brands !
So bad in fact that a fella might be running a japanese even though he might think his engine was American Made ! 1 horse power is 745 watts ! Thing is it was a bit more than propshaft horsepower ! The thing is the japanese engines were more modern and enjoyed a much higher Volumetric efficiency ! Before the mid 1980s OMC and mercury were still building that were started in the 1950s ! One of the most popular engines here was the 4 cylinder Merc 50
Anyway :) The american outboard manufacturers could not handle the competition !
It mattered not what it said on the cover ! Your engine was japanese !
It was a bit more to the story than just a measurment of measuring HP at the prop !
the 40hp in this video was 1989-newer. looks around 1993. by 1986 all manufacturers switched from powerhead to prop shaft hp. some started as early as 1983 depending on model. its not that they couldnt handle the competition OMC and Mercury made motors just as fast as the Japanese and many cases faster. but the Japanese definitely got them on refinement and easy to service tech for sure, especially making every motor loop charged (suzuki and yamaha) from the get go.
good comparison, but music was pretty bad
@@robertarnold1449 I appreciate the comment. Thank you.
Its 10 hp faster