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Seadoo Sportster 1800 is too loud.
- Thread starter zgn
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ssmedt
New Member
if you have twin engines you should have 787cc but there will be a plate in the engine bay; in this pic you can see my 2 stickers on the white above each engine (sorry only pic i have with the stickers in it) also are you hearing more engine or wind. on my smaller challenger the noise problem is because of the wind sinse our boats don't have a wind screen there is a lot of wind noise at speed. I did notice a engine nose reduction when i installed my hydro-turf but i don't think it will help the noise (but it really is a must do upgrade for your boat) as much as you want it to
96seadooxpBC
New Member
You might of bought the wrong boat mate to want it to be quiet, its got 2, 2 stroke engines, with no wind screens, but thats just my 2 cents. Aftermarket speakers will solve the not being able to hear the music, if you havent already.
Polk make good marine speakers, from experience, they rip over the noise of the engines,
Cam
Polk make good marine speakers, from experience, they rip over the noise of the engines,
Cam
Upgrade the stereo system. That fixed the problem for me. I can rock out while even at WOT.
i have a 2007 c180 and im looking to cut the noise too, i see under the hatch in mine there is egg crate black foam, it looks like the same stuff used on bed matresses and camping. its only under the hatch im thinking about getting more to line the inside of the engine area. but im worried what temp is actualy in the engine area, Obviously keeping it away from moving parts and exhaust think it would be fine? it cant be more than 200 F in there
I think what everyone is trying to say is, you have a really fast boat, with two 2 stroke motors roaring, and it's going to be loud. Unless you can come up with a way of insulating your boat more, you're stuck with a loud noise, which to you might mean it's defective, in which case I'd like to buy it from you.
Sounds like insulating isn't a common thing, so turn up your stereo... I don't think there is a cure for your problem. My single engine sportster is loud.
Sounds like insulating isn't a common thing, so turn up your stereo... I don't think there is a cure for your problem. My single engine sportster is loud.
96seadooxpBC
New Member
I understand your frustration, but the question itself is a dead end. The boat you own has 2 rotax, 2 stroke high revving engines, designed specifically for high performance/high speed ( like i said before ) not for quietness. It looks like your going to have to come up with a solution yourself, whether it be buying sound proofing foam and lining your engine bay with it, too buying sound proofing floor mats ( very exspensive, decrease performance ), but even then, im not sure lining your engine bay with an insulate is advisable, due to the heat these things produce. Which leads us again to saying you may not have the ideal craft for pleasure cruising and having a chat. This forum is wonderful and has lead me to answers on questions i didnt have a hope in hell of knowing, you just need to ask ones that we can give you a solid and logical answer too, or else we're gonna look like the bunch of morons that you've pointed out above. Hope this doesnt offend you, because i surely did not intend to, cheers.
:cheers:
Is it "engine" noise or "exhaust" noise, thats troubling you? Exhaust noise, try extending the the outlet, so its more into the water? If engine noise, like previous member mentioned, install more "egg-crate" foam or go to the audio store, and get some "dyno-mat", and insulate the deck lid....my 2 pennies.
SeadooBOB Square Pants
New Member
I find that drinking heavily usually drowns out all engine noise. :ack:
waaaaaaaaaaaaaaaaaaaaaaaa
Yes, the sound is just annoying. Might just be me, but it seems to resonate through the whole hull. I'm going to try some blocks of foam as baffles in different areas of the hull. Who came up with the idea of the eggcrate foam ONLY on the inside of the motor hatch anyway? I hope I don't cause pockets of gasoline vapor and get blown up, we'll see
Yes, the sound is just annoying. Might just be me, but it seems to resonate through the whole hull. I'm going to try some blocks of foam as baffles in different areas of the hull. Who came up with the idea of the eggcrate foam ONLY on the inside of the motor hatch anyway? I hope I don't cause pockets of gasoline vapor and get blown up, we'll see
custompartsguy
Well-Known Member
Yeah that makes good sense! :banghead:
96 speedster 717s
New Member
My 96 speedster is louder than I'd like also. Seems like the exhaust ports are not under water enough.
Is that what it sounds like to you? I thought maybe I needed to remove some weight from the front or something.
Please let me know how you extend the exhaust and if it helps.thanks
Is that what it sounds like to you? I thought maybe I needed to remove some weight from the front or something.
Please let me know how you extend the exhaust and if it helps.thanks
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SO... Does your boat have the engine cover that lets you store stuff back there when you open the engine hatch?
These are much more quiet than while moving at speed... to get a baseline of the noise level you are perceiving... can you speak and be heard without issue at idle?
On the Sportster you sit on the very back row next to the engine. If you (to test) sit on the bow seat at speed, can you hear the water splashing, or just engine noise?
I'm trying to establish if you are hearing normal noise of if it's something abnormal. They are loud, but it should not be horrifyingly loud (as it is with the engine bay open, or when missing the storage tray) I have chickened out testing with the engine cover open at speed due to the noise, when I did not have ear protection available. It was just too loud.
These are much more quiet than while moving at speed... to get a baseline of the noise level you are perceiving... can you speak and be heard without issue at idle?
On the Sportster you sit on the very back row next to the engine. If you (to test) sit on the bow seat at speed, can you hear the water splashing, or just engine noise?
I'm trying to establish if you are hearing normal noise of if it's something abnormal. They are loud, but it should not be horrifyingly loud (as it is with the engine bay open, or when missing the storage tray) I have chickened out testing with the engine cover open at speed due to the noise, when I did not have ear protection available. It was just too loud.
With my boat's shape, the exhaust is seems out of the water with the slightest forward movement, and certainly when at idle it remains way above the water line.
96 speedster 717s
New Member
Are the ports in this spot on your boat?
Sorry for the bad pic,it's backed against the wall. Upper pic is a 96 speedster. Lower pic is 97 challenger. Or is the port like this one?lower pic
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ORION '95 Speedster
Active Member
1) Re-duct your engine compartment ventilation system by adding a "U" shape to the interior section of the ducting. Make sure to put sound dampening material on the inside of the new ducting.
2) Insert some tubing into the exhaust ports that have a bend in it, to vent the exhaust further under water. Consider adding a "gun silencer" type baffle to the end of the tubing. Tubing that is not smooth will work better for noise reduction.
3) Add more material around the air intakes, such a small vented box with noise dampening materials inside.
4) Build a large "shield" that will loosely cover the motors. Not a blanket, but more of a "car port" type of thing, with noise dampening material on BOTH sides.
5) Ensure that nothing is touching the motor or exhaust, as the vibration will travel strait into the hull and make a lot of noise.
6) Ensure that all the rubber mounts for the motor and exhaust are not worn out, allowing vibrations to travel.
7) Check the engine hood gasket, and try to make improvements there for a better seal.
8) add noise dampening material to the under side of the engine hood.
9) check out the drive shafts, any excess play that could be transmitting vibrations to the hull?
10) add a "spoiler" that would separate the seating area from the engine compartment and exhaust. (make it flexible and or retractable)
11) add a spoiler to the very rear of the boat, to block the exhaust sounds from coming forward. (make it flexible and or retractable)
Alright, let the comments roll. Tell me how stupid all these ideas are and how "that wont work".
2) Insert some tubing into the exhaust ports that have a bend in it, to vent the exhaust further under water. Consider adding a "gun silencer" type baffle to the end of the tubing. Tubing that is not smooth will work better for noise reduction.
3) Add more material around the air intakes, such a small vented box with noise dampening materials inside.
4) Build a large "shield" that will loosely cover the motors. Not a blanket, but more of a "car port" type of thing, with noise dampening material on BOTH sides.
5) Ensure that nothing is touching the motor or exhaust, as the vibration will travel strait into the hull and make a lot of noise.
6) Ensure that all the rubber mounts for the motor and exhaust are not worn out, allowing vibrations to travel.
7) Check the engine hood gasket, and try to make improvements there for a better seal.
8) add noise dampening material to the under side of the engine hood.
9) check out the drive shafts, any excess play that could be transmitting vibrations to the hull?
10) add a "spoiler" that would separate the seating area from the engine compartment and exhaust. (make it flexible and or retractable)
11) add a spoiler to the very rear of the boat, to block the exhaust sounds from coming forward. (make it flexible and or retractable)
Alright, let the comments roll. Tell me how stupid all these ideas are and how "that wont work".
All seems reasonable to me in principle, just a matter of cost (in both time and money) vs payback.
Getting the exhaust underwater would be tricky, because the friction is great at speed. Maybe something that keeps it underwater until you plane...it still needs to hold to 15MPH or ? (made it up) whatever speed the boat displaces enough water to create enough wake to expose the pipe. I would not look to place the exhaust underwater at planing speed.
Also, The engine hood idea seems concerning with fumes, I would not try that myself. I think the exhaust extension to underwater to quiet speed at slow speeds (No idea how to do this safely though, and preventing water ingestion in some circumstances)+ sound dampening under the rear tray could be cost effective. the others seem more work than it would be worth, but don't let my laziness stop you from trying!
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