Frankfearn,

Sorry about the delay I wasn't aware of the new post until today.

Although I bought the vibration isolaters from Apache I never used them for the laser 150. The engine was mounted using a glass/nylon engine mount. I always have difficulty in locating the large size nylon mounts. Eventually settled on the Anderson type available from Inwoods. If you can't find a size big enough, a smaller size cut in half will do (as recommended by Laser). The nylon mounts seem to provide a certain degree of isolation and will shear off in a crash (unthinkable!) with probably less damage to the motor.

I also find a 16x8 glass/nylon prop from (Graupner) is so far the best. The Master 16x8 with narrower blades seem to rev too high with less pull. Haven't tried their K series yet.

Are you running muffler pressure?

Ron