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-   -   288 MCOB exhaust tips (https://www.offshoreonly.com/forums/sunsation/338443-288-mcob-exhaust-tips.html)

ZeroG 06-21-2016 10:56 AM

Thanks Knot 4 me. Yep they will be the Corsa tips for sure. I think that is the way I'll go. I do not understand the baffled tips when one has captains call to quiet things down. No need for a baffle. IMO.

Wasted Income 06-21-2016 12:11 PM


Originally Posted by ZeroG (Post 4451782)
I do not understand the baffled tips when one has captains call to quiet things down. No need for a baffle. IMO.

It is to keep you within the legal dB limit when you're operating at a speed of more than 3000-3500 rpm. Most "captains call" setups don't suggest running WOT with the exhaust diverted underwater, due to backpressure concerns. The muffled tips would keep you quiet while running hard. But that is for queers. lol.

ZeroG 06-21-2016 12:13 PM

Ahhh, ok. I do not have that issue where i am so no worries. Thanks for the explanation. :tiphat:

Sunny32SSR 06-21-2016 12:22 PM

I went from baffled to non on my 288. Made a huge difference. Ended up getting them directly from the factory.

ZeroG 06-21-2016 12:32 PM

Kewl, that is exactly what I was hoping to hear. Awesome.
I did just have to replace the entire captains call as it was not working. It was always quiet. I did not know about not running above 3000 or 3500 with captains call on.
I had to replace the entire wiring set up as it was all one piece. Are there any other good to know things with captains call? I heard (and it makes sense) you only switch from one to the other at low RPM. And someone told me if you leave it on the loud side with the boat turned off it can drain your battery. That does not sound right to me. I think I've left mine on with no issues, but not sure.
Any other tips?

Wasted Income 06-21-2016 12:53 PM


Originally Posted by ZeroG (Post 4451835)
I heard (and it makes sense) you only switch from one to the other at low RPM. And someone told me if you leave it on the loud side with the boat turned off it can drain your battery. That does not sound right to me.

Well, like you just learned, you shouldn't be running it closed at high RPM, so that would make switching only at low RPM a non-issue. I used to switch mine at cruise speed when I came across the water patrol...I would say "low rpm" in this case could be defined as below 3500.

As far as battery drain, that would depend how it's wired. Does the exhaust switch or captains call solenoids have power when the key is off? If so, you're probably draining the battery. If it's wired to the ignition key, then no.

Jeff Sunsation 06-22-2016 01:44 PM

Most of the boats had 4" angle cut tips from Eddie Marine. Part # 100-08. These have the internal flapper. We also did a lot with Big Gun tips from Corsa. Part #11138. Both sound good. I personally like the straight out exhaust if you can get away with it. As far as the battery drain goes, the captains call solenoid could be getting stuck, but once you turn off the batteries it should be off. It is not connected to direct power from the factory. Hope this helps.


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