2023 195S - Low top speed

[Jerlane]

Used. 2023 with 32 hours from a Yamaha dealer.

I was asking because it’s my understanding that the rpm are restricted during the break in period, but you’re outside of that window. I’m not sure exactly how that works since I didn’t buy my boat new. Doubt that’s it.

 

[FattyMatty]

Did you ever find out what the cause was for your issue?

 

[JetBoatMatt]

Did you ever find out what the cause was for your issue?

Not yet. I'm getting ready to give up and take it in for work. The engine isn't throwing any codes in the self-diagnosis.

Things I've tried:
1. Checked for blockage
2. Checked supercharger
3. Checked airflow
4. Adjust throttle cable
5. New sparks
6. Removed some oil to get it into correct range on dip stick
7. Changed oil entirely

 

[anmut]

Not yet. I'm getting ready to give up and take it in for work. The engine isn't throwing any codes in the self-diagnosis.

Things I've tried:
1. Checked for blockage
2. Checked supercharger
3. Checked airflow
4. Adjust throttle cable
5. New sparks
6. Removed some oil to get it into correct range on dip stick
7. Changed oil entirely

You've got a solid start.
Before you bring it to the dealership and pay for shop rates, I'd get under the boat (when it's on a trailer) and inspect your pump intake grate and tunnel for any sharp edges or missing sealant. If it sat unused, maybe some of that sealant is missing and causing bad flow through your pump.

 

[JetBoatMatt]

I'll pull it out and take a look next week. What should I look for? I've jammed my hand pretty far down there feeling around.

 

[FSH 210 Sport]

Know what you have not tried? Disconnecting the ride steady device. Dunno if that would make a difference or not but in my mind it could. Or at the very least look at the instructions or call ride steady and ask them.

The only other thing I can think of is a compression test, or perhaps the ETV, electric throttle valve, is not opening fully at wide open throttle.

If there was or is cavitation in the jet pump the engine would be revving up to the rev limiter as there would be reduced load on the engine.

 

[JetBoatMatt]

I can easily unplug the Ride Steady and try again. I have it turned off, so it shouldn't affect anything, but who knows.

 

[FattyMatty]

Not yet. I'm getting ready to give up and take it in for work. The engine isn't throwing any codes in the self-diagnosis.

Things I've tried:
1. Checked for blockage
2. Checked supercharger
3. Checked airflow
4. Adjust throttle cable
5. New sparks
6. Removed some oil to get it into correct range on dip stick
7. Changed oil entirely

Mine was doing sort of the same thing as yours. What I found was in the engine compartment if you are facing the engine in the right hand side there was a piece of foam that I had inadvertently knocked of. It wasn’t glued on very well. It was getting sucked into the air intake causing a restriction. I’m not sure if the 2023 have that foam right in front of the air intake but I looked at a 2025 yesterday and it is not there. There is only about 2-3 inches at most between that foam and the air intake. Check yours to see if anything like that is possible. I had to have my wife help me, so I drove and she watched as I gave it throttle. I may just get rid of that piece of foam all together since I see no significance as to why it is there. The only thing I can see is that it is a filler of some sort for noise between the engine compartment and the port under seat storage area where the battery is. Plus only 32 hours on the boat when you got it. Did the previous owner have the same issue and trade it in?

 

[JetBoatMatt]

Mine was doing sort of the same thing as yours. What I found was in the engine compartment if you are facing the engine in the right hand side there was a piece of foam that I had inadvertently knocked of. It wasn’t glued on very well. It was getting sucked into the air intake causing a restriction. I’m not sure if the 2023 have that foam right in front of the air intake but I looked at a 2025 yesterday and it is not there. There is only about 2-3 inches at most between that foam and the air intake. Check yours to see if anything like that is possible. I had to have my wife help me, so I drove and she watched as I gave it throttle. I may just get rid of that piece of foam all together since I see no significance as to why it is there. The only thing I can see is that it is a filler of some sort for noise between the engine compartment and the port under seat storage area where the battery is. Plus only 32 hours on the boat when you got it. Did the previous owner have the same issue and trade it in?

I pulled along the foam and did not notice any that was loose, but I'll double check what's in your photo.

The dealer told me that they traded it in to get a pontoon to match their friends boats. I have no idea what is true there. I would hope that this would be covered under warranty, but I've avoided bringing it in because I have no idea how long it will be out of commission.

 

[FattyMatty]

I pulled along the foam and did not notice any that was loose, but I'll double check what's in your photo.

The dealer told me that they traded it in to get a pontoon to match their friends boats. I have no idea what is true there. I would hope that this would be covered under warranty, but I've avoided bringing it in because I have no idea how long it will be out of commission.

Yeah exactly who knows how long it will be out. Then you’d miss a lot of water time. Did you get a warranty with it buying it used? I know mine was only for 1 yr when I bought mine new. That foam may look like it’s on there but that engine sucks a lot of air in when it needs it. Another suggestion someone on here gave me was remove the hose either from air box or the other side at the supercharger and run it for a quick minute to see if you still have the same issue. I’d do it from the airbox side as not to have anything get into that supercharger. Then you can at least eliminate that section if it still does it or if it does not then you have isolated your issue.

 

[JetBoatMatt]

I got the remainder of the extended warranty the previous owners purchased.

I did disconnect removed the filter and try running with no improvement. I forgot about that one. That should eliminate the foam problem.

 

[FattyMatty]

I got the remainder of the extended warranty the previous owners purchased.

I did disconnect removed the filter and try running with no improvement. I forgot about that one. That should eliminate the foam problem.

Well that’s nice you got the rest of the extended. I hope if you do take it to them they don’t give you the run around and tell you they can’t find Anything wrong. Are they close to water so they can test it or you can show them what it is doing. My dealer is about an hour and a half away but he’s on the river so I can show them what it’s doing in real world situations. So when you removed the air filter did you have the entire box out completely or just took the filter out of the box and put it back together?

 

[JetBoatMatt]

They have a location on my lake. I'd likely just cruise over there and have my wife pick me up.

I removed the air filter and left the box hanging open, there was plenty of airflow.

 

[FattyMatty]

They have a location on my lake. I'd likely just cruise over there and have my wife pick me up.

I removed the air filter and left the box hanging open, there was plenty of airflow.

Ok I see now. Well dang. I hope you can get it working now it’s supposed to. If you do or you take it in let us know what you find out.

 

[Jdz1]

Sounds like you've check the big hitters. Do you have a trolling motor and heavy anchor up front? Heavy things up in the front storage, are people riding up front when you speed tested?

 

[JetBoatMatt]

Sounds like you've check the big hitters. Do you have a trolling motor and heavy anchor up front? Heavy things up in the front storage, are people riding up front when you speed tested?

Its just been me on the boat when testing. Speed is the same with full vs empty tank. Small anchor up front, no trolling motor. The boat is pretty much stock outside of the Ride Steady.

 

[FattyMatty]

Hey I’ve heard some of you all talking about how elevation can affect speed etc. The lake we moor our boat at is at 1548 above sea level. At that elevation how much could it affect it and do I need a different pitched impeller?

 

[Btsnhos]

I got the remainder of the extended warranty the previous owners purchased.

I did disconnect removed the filter and try running with no improvement. I forgot about that one. That should eliminate the foam problem.

Have you checked cavitation from the clean out plug? There are threads on here about how to check it, my clean out plug is always full of water at the end of the day and I have experienced some cavitation. I did the toilet bowl ring wax on there, no joy.

 

[FSH 210 Sport]

Have you checked cavitation from the clean out plug? There are threads on here about how to check it, my clean out plug is always full of water at the end of the day and I have experienced some cavitation. I did the toilet bowl ring wax on there, no joy.

If there was enough cavitation to cause speed loss his rpm’s would be maxed out but they are not, he should be getting at least 7400-7500 rpm and he’s at 7200.

You need to read this thread; Another Clean-Out Plug Thread

 

[FSH 210 Sport]

Its just been me on the boat when testing. Speed is the same with full vs empty tank. Small anchor up front, no trolling motor. The boat is pretty much stock outside of the Ride Steady.

Looks like you’ve done everything you can… perhaps time to take it to the dealer or at least give them a call and see what the schedule looks like.

You are getting full flow out of the pilot water and intercooler discharge ports on the side of the boat yes?

What is your location? Are you on salt or fresh water?