My muffler just corroded out on my Hunter 27' with a Yanmar 1GM. Any ideas on a replacement muffler. I have looked at a PRIMEX cylinder style fiberglass muffled and a VERNALIFT can type with the side port and the top exhaust. Anyone use either of these and how would you mount the VERNALIFT and where. Any problems? The original muffler is beyond repair. Thanks for the help and I love my boat, except the shallow bilge.....