With the leg now complete, i moved back to the exhaust. This has been a problematic area from day 1. The problem is associated with the poor balance and vibration in the motor. Basically, the exhaust is shaking itself to death…
Originally it was solid all the way through but the thinner stainless of the pipe fatigued and cracked from vibration. So, in the last run i tried a silicone coupling i got from rcboatbitz but it only lasted the previous run before splitting and that’s what caused the boat to stall at the end. It was not really good for the job as it is designed for much smaller pipe and it was stretched to go over the 1″ pipe of my setup.
I’ve now just fitted a product that is made by octura. This one is still silicone but it’s reinforced with 4 layers of fibre as well. This one was 7/8″ so it’s still a slight strech over the pipe but not as bad as the other one. I have since found that octura do the same part in 1″ as well so if this one splits i’ll order one of them.
The bigest problem is the heat – it’s classed as a ‘high temp’ coupler but i have no idea on the actual rating of it. I tried to find some specs via the oracle that we know as google but it turned up nothing so far. With any luck it will actually hold up…
