[TR] TR6 no start

[Chip19474 at aol.com]

Jeff,
 
It almost sounds like the bowl floats are set incorrectly or the float  
valves are sticking....net result is too much fuel in the bowls which dumps 
into  the engine....mixture gets too rich, motor dies with a puff of black  
smoke.
 
One quick way to check this without removing the bowls is to take one or  
two spark plugs out after you've tried to start it and see if the plugs are 
wet  (fouled) with fuel.  If they are, try tapping on the sides of both float 
 bowls with the wooden part of a hammer.....if some dirt got past the fuel 
filter  and is stuck in the float valve, you may be able to dislodge it. 
 
If the problem doesn't point to stuck float valves or incorrectly set  
floats, it may be time to check cylinder compression.  If compression  isn't 
reasonably consistent across all cylinders, take the valve cover off;  have 
someone crank the engine while you watch the operation of each rocker  
arm....I've seen bent pushrods and I've seen the rocker arm adjuster nuts  back off 
completely and leave the pushrod just flopping around.....stuff  happens!
 
Good luck
 
Chip Krout
Delaware Valley Triumphs,  Ltd.
Delaware Valley Miata Club
Skippack, PA 
 
 
In a message dated 7/11/2015 8:31:29 P.M. Eastern Daylight Time,  
fishplate at gmail.com writes:

Interestingly, when I replaced the carb, it tried to start with  an
empty bowl.  But as it filled, it got more reluctant to  start.  Spins
like crazy, but no  pop.

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