Brand new Merc 25 growls on deceleration

[Czar]

Just bought a brand new Merc 25 hp 2 stroke. Ran it through one tank of gas to break it in. When I decelerate from full throttle I get a growling or almost a grinding whine, is this normal for a Merc ? This is the first Merc I've owned.<br /><br />Thanks

 

[ehenry]

Re: Brand new Merc 25 growls on deceleration

Any idea where the sound is coming from?? The lower unit, the power head? I have the same engine and haven't noticed any sounds that are unusual.

 

[Hooty]

Re: Brand new Merc 25 growls on deceleration

When in doubt, take it back. If dealer sez it's o-k and something turns loose later, you'll have documentation to back you up.<br /><br />c/6<br /><br />Hooty

 

[Czar]

Re: Brand new Merc 25 growls on deceleration

The noise seems to be coming from the lower half of the motor not the powerhead. But I think taking it back sounds like good advice but I will wait a while as I have a 1 year warranty. Just thought maybe this was a normal Merc sound.<br />Thanks for your input guys.

 

[ehenry]

Re: Brand new Merc 25 growls on deceleration

Czar, I wouldn't wait, I'd go on and take back.

 

[Newhook]

Re: Brand new Merc 25 growls on deceleration

Don't know if this helps but I have a 25 Mariner 4-stroke and if I decelerate quickly or cut the motor while the engine is in gear and moving, I will get a clicking or rattling noise. I discovered that it was the sound of the prop turning and the ratchet clicking at the prop due it turning as the boat moved. All normal.

 

[Czar]

Re: Brand new Merc 25 growls on deceleration

Actually after listening to the noise it is more of a whine than a growl. It sounds like something winding down and only happens on a rapid deceleration so maybe it is the prop just slowing down. Will investigate further.<br />Thanks