The manual primer can also create a no start rich condition if the pilot doesn't get the knob seated and locked, which happens more frequently than A&P's would like to admit. All the certified planes I flew with carbs had this type primer, and half were so hard to push in and out after a few years, that it would be easy to not have it seated by a low hour pilot. This then allows the fuel to be "sucked" in through this primer port as well, causing a rich condition and engine stall. Also you can't use this type while cranking, only before. I do not like it because you do not know how much fuel you are injecting, and you get all at once, like gradually like the solenoid. The electronic solenoid can hang open true, but if a high quality one is used, it should be reliable for many years trouble free. Cold start solenoids have been used on VW engines in cars for years, and would be perfect for those wanting a single injector after the carb...
Colin Rainey [email protected] EarthLink Revolves Around You.
