RE: OS max 52 surpass 4 stroke is this true
You need to make sure the valves aren't gummed up but more than likely it just needs to be run some and as to the onboard glow driver if an engine is adjusted correctly and the fuel tank is in the correct position with the carb there is no need for an onboard glow driver all it will do is add weight to your spit and you will want to eliminate all the weight you can if you are putting a .52 on a .40 sized model I normally try to put at least a .70 four stroke on a .40 size plane but it just depends on the total weight of the model. Just my .02