I'm afraid the APC 15-4 is too small for your engine. I run the APC 15-4 on the Saito .91 and a APC 17-6 on the 1.50. The 16-4 seems to work best with the Saito 1.20 on my Funtana (a 16-6 if I'm running 30% fuel) but at least for the Funtana and my Laser 200 the APC 17-6 is the way to go. A 15-4 is a good prop to bench run the engine during break-in but I wouldn't fly a plane with it, You need to keep the RPM'a under 10,000.