I did not change the engine mounting height for the Yamaha 90-HP two-stroke-power-cycle engine on my NAUSET 16 boat [as was discussed in the prior thread], and I left the engine as it had been mounted [in the lowest possible position and] using the blind mounting bolts.
With a Yamaha aluminum propeller [of unknown number of blades and] 17-pitch, the NAUSET 16 boat is very responsive. The Yamaha 90-HP engine accelerates at full throttle to 5,500-RPM, producing a boat speed of 42-MPH speed over ground by GPS.
I feel that less than 1-MPH speed would be gained if the engine were raised two-holes higher.
I feel that replacing the current aluminum propeller with a better propeller might add a bit more boat speed--but not very much.
Advice I got from Jim and Phil [who both recommended against buying and installing a jack plate] was good advice, and I saved a lot of time and money [by not buying and installing a jack plate].
The 50-year-old NAUSET 16 is shown in Figures 1, 2, and 3.
- Fig. 1. A NAUSET 16 with all,original wooden components, now reparied.
, - nauset1.jpg (42.56 KiB) Viewed 2229 times
- Fig. 2 The dock were the photographs were taken.
- nauset2.jpg (40.6 KiB) Viewed 2229 times
- Fig. 3. A 50-year-old NAUSET 16.
- nauset3.jpg (32.44 KiB) Viewed 2229 times
The original wooden components were taken apart, stripped, repaired, and put back together. To replace the original wood with new wooden parts would have been a lot less work, but the plywood available today is just not suited or intended for marine use.
