High RPMs, Low Speed

[KxStrt]

Out on the Lake Saturday, AUX battery warning light goes off, then both engine warning lights go off. Boat, on both trips out, runs about 4900 RPMs and going 9 mph. Plugs are in tight. What am I missing? Boat has 2 hours on it. Everything is brand new. Local marina checked everything out for me and nothing is clogged or in the way. Heading back to the dealer, if I can't figure it out. Help please...

 

[malibu Dan]

What boat are you running

 

[Adrian @ JB Solutions]

I would guess a '17 212x.

 

[malibu Dan]

Sorry just saw that... are you absolutely sure cleanouts are seated tightly

 

[Adrian @ JB Solutions]

Have you opened up the throttle yet? 4900 at 9mph seems about right if you are not on plain. I would be more considered if you can't reach into the 40s at open throttle.

 

[KxStrt]

17' 212x . hell of time trying to update the profile.

 

[KxStrt]

Sorry just saw that... are you absolutely sure cleanouts are seated tightly

That's all I'm sure of.

 

[KxStrt]

Have you opened up the throttle yet? 4900 at 9mph seems about right if you are not on plain. I would be more considered if you can't reach into the 40s at open throttle.

Not yet. Aux battery warning light came on followed by both check engine lights. Based on all the videos Ive seen, I'm supposed to be at 30mph @ 5500rpm. I did run a stretch at 10 mph @ 3300rpms, but I figure why it sounded so good for such a short stretch.

 

[PaulyB]

Where are you located?

 

[Scottintexas]

and the boat was operating without any issues the previous 2 hours ??

Local marina - was this the dealer you bought the boat from, did they just give you the boat back and say "no problems found"

so you have the throttles full forward and your engines can only make 4,900 RPM ?



.

 

[KxStrt]

Where are you located?

Southern Wisconsin

 

[KxStrt]

and the boat was operating without any issues the previous 2 hours ??

Local marina - was this the dealer you bought the boat from, did they just give you the boat back and say "no problems found"

so you have the throttles full forward and your engines can only make 4,900 RPM ?



.

This is embarrassing, the first hour was spent learning the importance of properly sealed clean out plugs. Next 1/2 hour was running down the river in a no wake, hit the mouth of the lake and accelerated. Short period of time, Aux battery light is on , then both engine lights. Local Marina, not the dealer, checked the pumps, ran it, "no problems found." I haven't had an opportunity to open the throttles. But it will go higher on the rpm's.

 

[Adrian @ JB Solutions]

Might just be a bad battery or it hasn’t been charged enough.... as far as your error and check engine lights.

 

[Scottintexas]

do you have access to the boat now, is at your house or on the lift or do you leave it at the lake/storage facility?

I agree with Adrian, start out with the easy stuff, assuming you have two batteries are they on separate switches or can you run off both at the same time, how was it set ?

Maybe just the 1 hour messing with the cleanout plugs with the stereo on was enough to drain them ??

 

[swatski]

Have you opened up the throttle yet? 4900 at 9mph seems about right if you are not on plain. I would be more considered if you can't reach into the 40s at open throttle.

That was my thought exactly... These boats spin fast, hard, loud, and you need to push 5-6,000 RPM to get going...


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[buckbuck]

@KxStrt I am in Northern IL. I may have some flexible time this weekend. You want a hand looking at it?

 

[Adubbs76]

I just checked on my boat 4900 is 20 mph

 

[KxStrt]

I just checked on my boat 4900 is 20 mph

So there is a problem.

 

[KxStrt]

@KxStrt I am in Northern IL. I may have some flexible time this weekend. You want a hand looking at it?

Thank you for the offer. I'm not sure what to do.

 

[KxStrt]

do you have access to the boat now, is at your house or on the lift or do you leave it at the lake/storage facility?

I agree with Adrian, start out with the easy stuff, assuming you have two batteries are they on separate switches or can you run off both at the same time, how was it set ?

Maybe just the 1 hour messing with the cleanout plugs with the stereo on was enough to drain them ??

2 switches, both have been left in the "ON" position since Memorial day.