I've been doing some research with Garelick, and thought I'd share my findings in case anyone else is thinking about putting a 4-stroke behind their CP-16.
71033: If you have a 4 stroke, 2 to 6 h.p., 60 lbs or less, you can use 71033. The 71033 is marketed for a 2-stroke, however, it has a plate on the front giving it added strength. Garelick has tested & approved the bracket to be used with a 4 stroke, 2 – 6 h.p. and 60 lbs or less.
If your motor is larger than listed above, you would need to go to either the 71093 & 71094 (these brackets are the same as the 71090 & 71091, with less spring to accommodate the lighter 4 strokes). The deciding factor is usually your vertical travel needed. The 71093 is 9 ½" and the 71094 is 15 ½". The 71093 weighs 20 lbs. and the 71094 weighs 32 lbs.
Garelick 4-stroke Brackets (Summary):
| Model | Weight | Vertical Travel | Max HP | Max Weight | MSRP |
| 71033 | 17 lbs | 11.25" | 6 hp | 60 lbs | $320 |
| 71093 | 20 lbs | 9.5" | 15 hp | 115 lbs | $330 |
| 71094 | 32 lbs | 15.5" | 15 hp | 115 lbs | $450 |