Motor for Number Jewel boat

[mgsolakis]

I hope I'm posting in the right place for this question. I'm looking at powering a good 11'6 Humber Jewel boat. The boat has a wide beam and a lot of surface area in the water. I actually used a 1975 75 hp Evinrude on it for a while, jacked up a bit but I found the displacement to be a little low and it struggled to get out of the whole. I'm looking for a motor that offers good power to weight I was looking at a couple of options. One option is a 1999 Yamaha 60 hp 2 stroke also looked at an older Mercury 4 cyl 80 hp though it might be too heavy. Any suggestions?

 

[racerone]

Well-----That 3 cylinder 75 is the ideal engine for the Humber Jewel.----It should simply fly with that in good condition !-----What pitch prop did you have on that 75 HP.-------And was it a short or long shaft ?----Small gearcase ?

 

[mgsolakis]

It was a long shaft, the boat actually takes a long shaft. I initially tried a Mercury 50 hp short shaft and it was too short. The Jewel takes a long shaft motor. I think it was a 17 pitch prop. I tried a 19 pitch but it could not get the boat to plain due to no low end power. The 75 Hustler was used on many boats that I had in those days and it always was a great performer but not on this boat strangely. I think the lack of low end to the 49ci displacement was the issue along with the weight of the motor on the back.

 

[gbrowne9]

something is seriously wrong with the 75HP if it can,t get a humber jewel on plan in like 4 seconds.i would stick with any of the omc or later merc 3 cylinders.