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Paul (no login)
Posted Apr 21, 2008 8:12 AM
I decided to see what the heat activatd choke assembly looked like inside, and I’ll post the photo images tonight. It’s pretty cool how they got this device to work. There is a copper piston that rides in a bore, and it’s function is to stabilize the lever arm forced by the thermocouple. Odd thing about it, however, that piston doesn’t like dirt and it will seize up if a speck of dirt gets in. I had to work mine a bit while flushing with carb cleaner, but once it was clean inside that bore, it functioned like new. I put a couple drops of Teflon oil on it to keep it sliding.
The design is flawed because the bore is turned up so it gets any dirt that may drop in. Sadly, this is probably THE reason many of these old chokes stopped working. I suspect mine will work fine when it is installed, and I’m anxious to try it out.
With the check valve and chokes, starting the boat will become a new experience.
Regards,
Paul
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