Changing Motors

T

TonyDo

Recruit
Joined
Feb 17, 2005
Messages
1
Hi<br />I have a 1965 Viking (Chrysler) 20 h.p. motor on a 1965 14-foot aluminum (Sears) runabout. Partly because of persistent oil leak problems from the lower unit,and partly because I would like a quieter motor, I am thinking of buying a new motor. Does a 20 hp 4-stroke weigh more than my current motor? (I am concerned that even though the boat is "rated" to take the motor, the new 4-stroke may weigh more than the old 2-stroke and I will be trading one less serious problem for a more serious one.) Are there other problems I should think about?
 
P

PAkev

Senior Chief Petty Officer
Joined
Sep 9, 2002
Messages
665
Re: Changing Motors

After 30 years of service, that Chrysler motor doesn't really owe you anything. I don't think you will be disappointed in owning a new 4 stroke. I would expect your existing motor has a lot of metal contributing to the weight and therefore wouldn't expect a new model 4 stroke (manufactured from modern lightweight material) to be much heavier.
 
P

Paul Moir

Admiral
Joined
Nov 5, 2002
Messages
6,847
Re: Changing Motors

I beleve your 20hp comes in at 75lbs (EDIT: Looks like closer to 80lbs). A new 4-stroke will be around 100-150 depending on which make and options. The Tohatsu 18hp weights 115 for example. <br /><br />Old outboards were made of aluminium, just like new ones. The old ones often weight less than modern ones due to simpler design, etc.
 
WillyBWright

WillyBWright

Fleet Admiral
Joined
Dec 29, 2003
Messages
8,200
Re: Changing Motors

To get the same kind of performance you had before, I think you should consider a 35Hp. I think if you put a 25 on you might be a little disappointed.
 
G

Guest

Guest
Re: Changing Motors

I was thinking just the opposite. In my experience, the older motors were not very strong when compared to new motors of equal HP rating. <br /><br />I was thinking a new 15 HP would be as fast (if not faster) than the old 20. The 35 might be way too large for that boat. <br /><br />Guess we really don't have enough specific info. <br /><br />Good luck, Trout
 
D

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: Changing Motors

I would think Willy is pretty close if we're still comparing the old 2 stroke to a new 4 stroke in that hp range. At least thats what we hear from people who have done that.
 
You must log in or register to reply here.
Top