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| Author | Comment | ||
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 jlcpolar |
Pro xs engine noise |
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Posts: 1 (06/09/09 03:02) |
I have a new 09 Puma with a 250 Pro XS and was wondering what could be causing a loose washer or bolt noise at around 3000 to 3500 rpm coming from inside the
cowl or outside the engine? I know that there is a harmonic resonance from the reed slap but it seems to be causing a vibration somewhere.
Thanks, Josh |
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Mark5795 |
I bet it is your cover | ||
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Posts: 162 (06/09/09 03:05) |
Motor cover side latches rattle at least they do on mine....
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basscat247 |
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Posts: 1290 (06/09/09 03:19) |
Are you sure it is not a chatter sounding noise. they all do this if so and it is just the reeds chattering I think !!
Bass Cat or somebody else will chime in and correct me if I am wrong !! Good Luck |
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onebgfish |
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Posts: 36 (06/09/09 03:28) |
My motor has a whistle to it at 4000 to 5000 rpm,but it's a EFI
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Bass Cat Boats |
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Posts: 15649 (06/09/09 03:39) Registered User |
The mid rpm whistle is the air compressor sometimes. The rattle is often the lower motor mount covers rattling and not under the cowl.
BCB |
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JRoberts |
Noise | ||
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Posts: 13 (06/09/09 04:51) |
Do you have one of the new ladders, I have one on my 08 Cougar FTD and it took me several trips out to figure out what was making that noise. Was very
concerned until I realized what it was.
Good Luck, JR |
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PhilAddison |
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Posts: 3587 (06/09/09 05:38) |
normal.
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jlcpolar |
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Posts: 2 (06/09/09 05:45) |
I will tighten up the motor mount covers.Thanks, just making sure it was normal. |
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RoddyRude |
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Posts: 45 (06/09/09 08:23) |
Normal, mine has the same noise.
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Tideman |
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Posts: 1307 (06/10/09 09:47) |
SOUNDS LIKE MERC POWER WANTING TO COME UNLEASHED,AND BLOW AWAY THE
COMPETITION.....AWESOME.....JUST AWESOME.. 
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GAPuma |
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Posts: 64 (06/10/09 03:35) |
jlcpolar wrote: She just wants to be opened up!!! Serious go faster and you won't hear it. Sorry I had to 
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Chuck Hannaford |
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Posts: 132 (06/10/09 11:15) |
Make sure it is not the E-ladder rattling. Sometimes at that RPM it sounds like coming from cowl. Mine does it from time to time.
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Rich65 |
Motor noise | ||
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Posts: 12 (06/11/09 11:25) |
I have the Pro XS on my R boat and it makes that noise. I think it is the small covers on the lower unit (sorry, dont know the technical name). They are on
each side.
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Bass Cat Boats |
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Posts: 15679 (06/11/09 03:08) Registered User |
Most of this is caused by harmonics and thus the rattles of various components. The boys in black are aware of the harmonics noise.
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onebadcat |
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Posts: 57 (06/11/09 08:47) |
I have also been told its a reed rattle. Mash it harder the Mercs love that anyway.
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Bass Cat Boats |
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Posts: 15685 (06/11/09 11:48) Registered User |
It is not reed rattle.
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oldtimer57 |
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Posts: 1207 (06/14/09 11:11) |
You would need superman-type hearing to hear the reeds. They don't exactly rattle, they buzz and not loud enough to hear, even if you go to the 7-petal
reed cages. Some of the mercs from the racing division even came with Boyesen fiber reeds that you could not hear with a stethoscope. I helped a friend try
to find a similar noise. Tried laying on the back of the boat (carefully of course) while he drove. It appeared to be coming from the lower mid-section, so
your motor mount cover idea could be the issue. It's definitely harmonic-related however as higher engine speeds make it go away, his sounds off in the
3500 range roughly. (this is a pro-XS 250). I was not willing to hang over the back and try to feel the vibration.
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