To answer some of your questions , if the plate says 410 then it is most likely a newer version of the 400. The 400 was made in 1958-59 and used a Brown carb which there is no kits for, the 400A was also made in 1955 and uses a Tillotson -108A carb. The model 410 was made in 1960-61 and uses the Tillotson 108A carb and there is kits easily obtainable for these carbs, you can get them at any small engine repair shop. The Pioneer saws were being rapidly developed in this time slot and some parts were carried over into each newer model of saw hence you would see parts from an earlier model show up on the newer version as it would cost big money and take up considerable time to change the molds used to cast the parts just to change a number up from say 400-410 or like the 600 series they kept the top cover with 600 on it and used the cover on the model 600, 600A and 610. The usual changes dealt mostly with the carburetors, air filters and air intake adapters to give the engines better airflow and fuel delivery plus better air filtration. The carb should be an easy removal after taking off the air filter and the rear handle cover to expose the throttle linkage. The fuel primer and hoses are one of the worst problems with these old saws and they usually need replacing but the primer pump kits are rare although Propliner has them sometimes. Keep us informed how you are doing ant let us know what type of carb you have on your saw when you get it out.
Pioneerguy600
