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TR2/3/3A TR3A Engine Startup Follies

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Joe Alexander sells one. It's not on his site, but I've seen it somewhere. He's also selling an improved rear seal that requires no crank machining. They modify a stock seal somehow to accept a split rubber seal. I'd bet a dollar that Joe's mandrel works. If anyone would know that he factory spec. is wrong, he would.
 
Joe's tool is made to the same dimensions that Art described.
 

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DougF said:
On the back side of the Unisyn there is a dial that adjusts the airflow through the unit. It can be opened and closed to compensate for the amount of air flowing into the carbs.
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You can also make the unit much more sensitive, by tilting the tube with the floating ball. I found that to be essential, as closing the venturi enough to float the ball straight up was making the engine run bad (thereby distorting the reading when moving from carb to carb).
 
And the BPNW tool looks like Joe's so I'm assuming he's marketing it similar to other stuff he makes. My micrometer skills are a little rough, but the smaller diameter I think I'm getting 2.6245 as shown, the larger diameter to me seems closer to 2.815, even smaller than Hardy's recommendation - but that just may be my lack of micrometer skills.
 
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