Mercury Technical Data

[spirithawk]

I have a 1966 Merc 650S, 4 cyl, sn #2018755. It runs great but is small for today's standards. It is on a 1966 (16') Starcraft aluminum runabout. New it would turn ~32mph. With hull buildup, dinged prop, etc it only turns about 24-25 mph. We are in t5he process of restoring before death. The engine and boat were bought as a combo. The transom is still good and strong but is a short one. I need to know gross engine weights to substitute for a more powerful motor - considering that modern engines are fuel injected and more efficient, it would seem that 20 -30-40 more horsepower could be attained without adding stern weight by going to a newer engine. Where can one find weight specs on various engines.

 

[rickdb1boat]

Re: Mercury Technical Data

You can go to the NADA site and click on outboards and look at the various models and weight..<br /><br /> web page

 

[spirithawk]

Re: Mercury Technical Data

Thanx - I needed that!!!

 

[spirithawk]

Re: Mercury Technical Data

For those interested: the weight of outboard motors varies more by number of cyl.s rather than horsepower-within a given HP range. So, the transon strength becomes more important than the stern weight. You may actually be able to lower the stern weight and still get a 20-30-40 HP increase - as long as the transom is strong enough to handle the additional thrust.

 

[Ben Konopacky]

Re: Mercury Technical Data

spirit; you also might want to check the hp rating on that hull. there should be a rating plate on the transom starboard side.