Which if the following is true? 1. The relief of back pressure on a 2 stroke was a topic of lengthy discussion in the 2 stroke bible. If i recall, this moves the power band of the engine towards the higher rpms at the expense of lower rpm power. 2. Resting ducks love to hear exhaust holes at 7k rpms.
Depends on application. On an air cooled 2 stroke it’s relative to have an open exhaust to run a cooler motor. The air cooled cools by the jug fins so technically the faster you pull fuel in and faster you get rid of it you see a power increase and cooler running engine. Water cooled you sort of want the back pressure hence the cone pipes and stuff like dirtbikes for regen/reburn
@@SBsports1 in my opinion it did. It’s really loud unplugged but normal with the plugs in. I did (2) 1” holes on each side of the gearcase. I have a video of it running posted i posted a while back.
there are 2 obvious benefits. Get rid of the back pressure in the rig and on the same time get rid of exess speed. As a side bonus others on the water will get angry. If theese same guys own 2 wheelers the same can be applied, ie. drill your exhaust pipe before the expansion. Good trick wont get your bike anywhere. There are guys who post tuning tricks here and those who don't, hard to tell who is faster 😁
when on plane properly you already get the exhaust noise from the prop ( or should do if on plane and set up right ).... snouts are the loudest especially if running dry stacked with the lower blocked off.
no more top end speed from this. just a bit better pull away if buried deep.... most people just like the sound..... me personally i like it.. but performance wise its only for the initial pull away, also good if you run over hub props
I don’t want to do this to my engine but at the same time I want to by a lot that can make it go faster? Dose anyone have any tips , it’s a 25 Yamaha 2 stroke
Why on Earth?? Because you're giving it more airflow.. more airflow requires more fuel delivery. A plug chop should be done and it should be rejetted if needed
and explain how this woukld fuck up a lower unit ? the lower will infact run even cooler not hotter... you get hot exhaust escape from the holes..... go look at a Johnson/evinrude SST60 for a prime example of how this is done from factory.
I like power more than most but to be honest all the mud boats and guys who purposely make boats loud just makes living on the water not as peaceful....its shitty to impose tour noise on others real shitty
@@kylegadd6277 no. it makes it louder when NOT on plane.. when on plane you get all the exhaust out the back of the prop that will have a completely clear exit..
so many stupid people who have no clue what this does are too quick to say its nonsense or it dont do anything... please state what motors you have and what props so we maybe able to explaine how crap your set up is and how you can gain better fuel consumption and go faster.....
are you totally thick ? please explain how on earth your going to take the exhaust manifold out ? you obviously have no idea about outboard motors . do even know what the manifold is ?
@@codyrivenburgh7645 of course you agree itsa waste of time, because yoiu have no clue as to what performance gains it gives, . i bet you even run with cav plate level to the bottom due to being totally ignorant... have you ever noticed pre 1970s motors with exhaust above the gearcase / do you know what a sst60 is or a forma E ? have you ever even looked at a volvo penta outdrive like the SP290 ? go on a performance page and learn a bit be fore sprouting such shit about it beinga waste of time... you clearly have no clue do you. just type in evinrude SST60 and take a look at the gearcase, you might learn something just from that alone. ...
The only waste of time I saw was tapping the holes to plug it back up. Drill it and enjoy the sound. If you don't like the sound that's fine, it's not for you.
no it is not.... if you do not understand why its done then fine, but dont comment its nonesense just because you do not have a clue as to its benefits.... maybe need to learn a bit more about outboards....... most who do this run a over hub prop and dont need exhaust running over the bladesand with this will geta better holeshot......... thats probably been a bit too much for you to take in .
Which if the following is true?
1. The relief of back pressure on a 2 stroke was a topic of lengthy discussion in the 2 stroke bible. If i recall, this moves the power band of the engine towards the higher rpms at the expense of lower rpm power.
2. Resting ducks love to hear exhaust holes at 7k rpms.
Depends on application. On an air cooled 2 stroke it’s relative to have an open exhaust to run a cooler motor. The air cooled cools by the jug fins so technically the faster you pull fuel in and faster you get rid of it you see a power increase and cooler running engine. Water cooled you sort of want the back pressure hence the cone pipes and stuff like dirtbikes for regen/reburn
Was that the theme song for "Trailer Park Boys" playing in the background? Ricky, is that you?
😂
you need to get a drill bit that fits the drill so it dont wobble around like that... but this is a good place to drill for exhaust vents..
I did this with my Johnson 60 but I did 1” holes and use a boat plug
did it make it sound better
@@SBsports1 in my opinion it did. It’s really loud unplugged but normal with the plugs in. I did (2) 1” holes on each side of the gearcase. I have a video of it running posted i posted a while back.
@@hughesweldingserviceok thanks it just sounded like normal when u plugged it
there are 2 obvious benefits. Get rid of the back pressure in the rig and on the same time get rid of exess speed. As a side bonus others on the water will get angry. If theese same guys own 2 wheelers the same can be applied, ie. drill your exhaust pipe before the expansion. Good trick wont get your bike anywhere. There are guys who post tuning tricks here and those who don't, hard to tell who is faster 😁
...what?
But this is after the expansion chamber??
That’s cool I respect that lol
LoL best get some earmuffs when on plane 🤣
when on plane properly you already get the exhaust noise from the prop ( or should do if on plane and set up right ).... snouts are the loudest especially if running dry stacked with the lower blocked off.
What gains did you get ? More rpm. More mile an hour ?
no more top end speed from this. just a bit better pull away if buried deep.... most people just like the sound..... me personally i like it.. but performance wise its only for the initial pull away, also good if you run over hub props
Haha sound sweet
Why do you need plugs
What do you gain from doing this ..??
Should have got the before and after on the water
Anything other than drilled exhaust?
Just sounds like a blowing exhaust now I wouldn’t of bothered
From boat to snowmobile with just 2 holes folks.
What prop are u running ?
Do you have to take lower unit off to drill?
no not at all.
Dude you can literally see he took it off in the video
What prop is that
Did you make a hole on each side?
Yes he did
Can have that boat i like that one
I don’t want to do this to my engine but at the same time I want to by a lot that can make it go faster? Dose anyone have any tips , it’s a 25 Yamaha 2 stroke
Check the max rpm to see if you can change the prop for a higher pitch
Yeah, leave it the hell alone that’s a good motor
Dose the lower unit have to come off to drill it ?
No sir, but it’s better to make sure you’re doing it in the exhaust manifold
@@noahellis7011 you mean exhaust Cavity that goes down into the lower above the carrier.... the manifold is right up top ...
@@noahellis7011 just curious, which section is the exhaust manifold?
Use brass plugs
actually be better to use cheap zinc plugs.
Personal preference I guess
Did you have to re jet?
why on earth would you have to re-jet ?
Why on Earth?? Because you're giving it more airflow.. more airflow requires more fuel delivery. A plug chop should be done and it should be rejetted if needed
Absolutely cool though
What’s the point of tapping it for a plug
I’d rather be fast than just loud tbh!
prepare to fuck up some lower units
and explain how this woukld fuck up a lower unit ? the lower will infact run even cooler not hotter... you get hot exhaust escape from the holes..... go look at a Johnson/evinrude SST60 for a prime example of how this is done from factory.
I like power more than most but to be honest all the mud boats and guys who purposely make boats loud just makes living on the water not as peaceful....its shitty to impose tour noise on others real shitty
What is the point to this??
Just makes it louder when on plane.
@@kylegadd6277 no. it makes it louder when NOT on plane.. when on plane you get all the exhaust out the back of the prop that will have a completely clear exit..
so many stupid people who have no clue what this does are too quick to say its nonsense or it dont do anything... please state what motors you have and what props so we maybe able to explaine how crap your set up is and how you can gain better fuel consumption and go faster.....
How can I get better fuel consumption off my mercury 50 lol
Just take the exhaust manifold out lol
are you totally thick ? please explain how on earth your going to take the exhaust manifold out ? you obviously have no idea about outboard motors . do even know what the manifold is ?
Mercury porquería
What a waste of time imo.
Not if you like the sound... millions of people like a sports/loud exhaust on a car too.
I agree waste of time...like oh look my boats loud...I'm cool
@@codyrivenburgh7645 of course you agree itsa waste of time, because yoiu have no clue as to what performance gains it gives, . i bet you even run with cav plate level to the bottom due to being totally ignorant... have you ever noticed pre 1970s motors with exhaust above the gearcase / do you know what a sst60 is or a forma E ? have you ever even looked at a volvo penta outdrive like the SP290 ? go on a performance page and learn a bit be fore sprouting such shit about it beinga waste of time... you clearly have no clue do you. just type in evinrude SST60 and take a look at the gearcase, you might learn something just from that alone.
...
The only waste of time I saw was tapping the holes to plug it back up. Drill it and enjoy the sound. If you don't like the sound that's fine, it's not for you.
That tap was anything but straight
Doesn't make any sense
This is absolutely nonsense
no it is not.... if you do not understand why its done then fine, but dont comment its nonesense just because you do not have a clue as to its benefits.... maybe need to learn a bit more about outboards....... most who do this run a over hub prop and dont need exhaust running over the bladesand with this will geta better holeshot......... thats probably been a bit too much for you to take in .
@@philldownes8685 who's gives a shit..I can see u hav no real social life..hahaha