Hi Larry-
I live in Iowa and was thinking about the primer system when I bought engine from Aerosport. Their guidance was it's probably not necessary unless you plan to fly in more extreme cold. I did not install a primer system and have not had any issues so far this year. Starts w/o issues at 20 degrees, haven't tried colder than that yet...not likely I will fly when it's colder anyway. More important that I preheat oil. I chose the less complex route and happy so far.
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Charlie Hammes
RV-8, N525RV Flying
RV-8, N208CH in process
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