Issue with the fuseable link in the carb is that it's proving to be too little too late - as proven by the melted down carbs sitting in the stoves that have runaway.
has responded to the need - as pointed out by Cburger, they've created a much better over temp device, an unpowered temperature sensitive shut off solenoid - visible online at: DickinsonMarine.com - Propane Fireplaces
So to clarify what I think we know:
- the carb has a fuel
overflow line that dumps excess fuel
when the pressure is too high (greater than 4 psi)
- the carb also has a fusable link that shuts off the fuel when the carb gets too hot.
- occasionally the carb float sinks, creating the potential for runaway
Unfortunately there are about 20 known instances on the BC coast alone where a Dickinson/Signmar (both have this issue) has gone into runaway conditions with no one onboard, the stove has overheated to the point where the carb MELTS, and between insufficient insulation
behind the stove and the now uncontrolled release of fuel around a stove that is hot enough to melt the pot metal carb, the boat is destroyed.
In these instances, the fuseable link obviously wasn't enough
I love Dickinson
heaters, and wouldn't consider going without on my boat - they provide great dry heat with zero power consumption
. The runaway issue is rare, but real - and I won't say that on a cold day, when my wife and I go for a walk, that I'm always going to shut down the stove.
The answer is to install the high temp solenoid Dickinson has now made available to address the issue - and I will be taking a closer look at adding a sheet metal shield between the carb and the fire pot, with the belief the solenoid will better address the runaway issue, and keeping the carb from melting takes priority over getting the fuseable link to let go....