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Fire Maple FMS-300T (stove) Question

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Stephen Barber BPL Member
PostedMay 25, 2013 at 8:08 pm

It's been mentioned a couple times here and on Hikin' Jim's stove blog that the FMS-300T is prone to a blockage from dirty fuel(?).

Question: Is this blockage something that occurs at any time during the stove's life, or is it something that individual stoves are prone to from day one?

So far my 300T has shown no inclination to blockage, and I tend to be careful with stoves. (For example, back in the day, my Svea 123 never blew the pressure plug, and I regularly cleaned the jet, with no problems while on the trail.) Am I safe from the blockage curse, or should I stick with my Montauk Gnat (FMS-116T)?

Roger Caffin BPL Member
PostedMay 26, 2013 at 12:14 am

In my humble opinion …

The chance of a blockage with the FMS-300T is exactly the same as with the FMS-116T. The two stoves have identical bases, valves and jets.

Good advice (in another thread) is to remove the sintered filter plug inside the jet and replace it with a scrap of tissue or TP. See the other thread for details.

Cheers

Stephen Barber BPL Member
PostedMay 26, 2013 at 8:01 am

Thanks, Roger – so it's simply a problem of the stoves design, and solving it is essentially remaking the filter, period. As a non-mechanically inclined person, I've been hesitant to do that for fear of screwing up the stove by my ham-fisted tinkering. How unpleasant to know I've got to do it twice!

PostedMay 26, 2013 at 10:32 am

the problem isn't dirty fuel. The problem is that fire Maple didn't put anything between the filter and the jet. As a result on some stoves a metal bead in the sintered filter presses against the jet blocking the flow of fuel to the jet.

When the jet is cold some fuel will make it to the jet and the stove will appear to work correctly. But once it warms up, the sintered blug expands, the flow of fuel is at least reduced and at worst totally stopped.

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