Turbo ? on a 1996 450 Da with 3126 Cats.

[relentlesss]

What kind of turbo noise is normal. Only other boat I had with diesels. Was a Viking 430 Pincess sport cruiser bridge boat. That was well insulated. So I didn't hear much.

 

[carterchapman]

I have AirSep filters and I don't hear any turbo noise from mine...

 

[fwebster]

For the 450DA, model year 1995 and some of 1996 were supplied from the factory without Walker AirSeps. The turbo whine was very noticable on the non-AirSep boats, to the point that it was hard to have a conversation in the cockpit at cruise speeds. When you pushed the throttle to get the boat up on a plane any dogs on board would immediately head for cover. When we bought our boat, I ordered the aft enclosure and a pair of AirSeps before we even left the slip the first time.

If you don't have them on your Cat engines, you should consider them. They have internal mufflers that are very effective in silencing the turbo noise.

 

[relentlesss]

I do have them. But I have noticed a bearing type noise or ringing sound on my stbd motor but no noise til i get to 2300 cruise and if I go over 2650 it goes away. very wierd. I look at the blades they look fine. New hose from turbo to a/c still same noise. ????? stumped