Hi,
I think that self amalgamating tape would work well on a snorkel. At least you would not have to take the snorkel off the carby and filter which can be trying sometimes.
There are two types of this tape rubber and silicone like.I think the rubber is best for this job. I use "Rubberweld". Its available in boat shops like Whitworths. about $12.00 but a roll goes a very long way as you stretch it about 3 times while applying. The rubber is extremely durable better than heat shrink in a tough environment like a mower.. Its even recommended as an emergency repair for burst water hoses.
All the best
Jeff
