Prop Nut, I wanted to do a Briggs but I talked to someone that blew one up mounting it inverted. How is yours mounted and have you had any issues? The WYK-61 is a 9mm carb and the WYK-38 is a 10.5mm carb. Both have high needles. Did you remove the spring return on yours? I am ordering both today to try them out. I would prefer to leave the WT carb on it but I am getting too much oil in the pulse line now. It was dry for a while but after running it with the header last night I had oil in the line. Ran and sounder better with the header too. I taked to Dave at Balsa USA yesterday about the cowl and he thought the hole in the bottom would need to be small if at all for this engine. I thought he said on the full size plane there was an opening there anyway for engine adjustments. The engine should fit easily left to right in the cowl. How tall are the Briggs engines center of to top of cylinder or rocker cover? If I use the WYK carbs I will need a new manifold to rotate the carb so the throttle shaft is verticle. How did you do yours? The videos were great. What do the planes weigh?

Tim