This weekend was the first long motor with the new flex pipe in the exhaust.
It makes a huge difference. Before with the engine running every dish and loose object like an open port or cockpit grate would rattle. Now there is far less vibration. It is much nicer to be in the cockpit now.
The old way had the manifold attached to the water injection elbow with 2 inch pipe and then a heavy 2 inch steel-wire-reinforced rubber hose to the muffler screwed to the hull.
In my install I could not find a way to insert a short flex pipe in the 2 inch pipe without moving the muffler or lowering the elbow too far. So I replaced the rubber hose with the flex pipe. I know it’s steel and this will be wet but so is the 40 year old muffler and I wanted to see if this worked. It is easy and quick to change back if needed.
Over the years I replaced the engine mounts, fuel, checked and maintained the engine, put all new sound insulation in, all without making any difference. It is a 2 cyl W13 and because of physics there is no way a 2 cylinder engine can be balanced. Now it is finally free to move and it really jumps around at idle, . Before it always just sat there.
Another great idea from the Nonsuch Group.
Tom
26C 28
Penetang