Re: OMC Homemade Triple Exhaust
Did you use the original log style riser?
Did you fab the tees yourself?
Do the tees run hot with the hub still taking some of the cooling water?
How does it sound?
I have an "88" bayliner 2250br with the same engine. I have been considering doing this for a while but I was going to cap my Y pipe and just run out of the risers straight thru. With the exhaust outlets way above the water line I would think you have no risk of water flowing back in the engine.
Do you have any problems or is it pretty solid in design?
I am still useing the "log" style riser
I built, cut, and welded the tees myself. Pretty easy.... I got some 3.5" SS tube and some 3" ss tube. Cut the 3.5" to just over 6" for the piece to connect the riser to the "Y" pipe. In the middle of the 3.5" piece I cut a 3" hole with a hole saw. Then took a 8" piece of 3" cut it at a slope on one end and side the slope end in the 3.5" tube, welded it all up. Then took 3.5" rubber bellow and connected them to the riser and the "Y" pipe. To connect the thru hull I used 3" exhaust flex hose and 2 45 degree elbows.
The tees and everything get no hatter then normal. Water is still running with the exhaust so it cools the exhaust gas even though most of the water going through the "Y" pipe
It sounds REALLY good! At idle it has a very nice rumble and at wide open it is nice... not to loud.
You want to make sure that everything runs down hill. I first ran right out of the riser but it went up hill just a tiny bit and pooled water up in the 90 coming out of the riser so when you shut the engine off it would not turn over from the exhaust being blocked.
I have NO problems at all! Very good system I am very proud of it
