MOTOR HEIGHT?

5466JOHN

Cadet
Joined
Aug 14, 2005
Messages
29
I have a 1987 Glastron 16ft., weight apprx. 1300lbs., with a 1979 Evinrude 100 horse, prop size is 13x19 (cupped).My top speed is 36mph @5000rpm. the stern bracket is at the top hole. Does this seem ok?
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: MOTOR HEIGHT?

For that motor to perform best and live the longest you'll want to target 5800 rpm as your top rpm with an average load. Usually Glastrons respond well to set up. You should be able to raise the motor. How far depends on what prop you have (brand & style), its condition and which model Glastron you have.
 

5466JOHN

Cadet
Joined
Aug 14, 2005
Messages
29
Re: MOTOR HEIGHT?

Its a Glastron Conroy Bowrider, Oem prop, new.Is it neccesary to cut the molding on motor well to make sure stern brackets dont hit when raising motor?
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: MOTOR HEIGHT?

You can trim the aluminum. Or use the same thickness aluminum plate (or thicker) to space the motor back. Many folks dont worry about it and just bolt the motor on.<br /><br />When you say "OEM prop" does that mean its an OMC prop? Aluminum or stainless?
 

Dhadley

Supreme Mariner
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Feb 4, 2001
Messages
16,978
Re: MOTOR HEIGHT?

Thats fine, thats what we assumed but it doesnt hurt to check. At 5000 (top rpm) youre running about 20% slip. We can do much better than that. 20% indicates that prop may be worn. <br /><br />Lets look at intended use. What do you use the boat for mainly? Will there be skiing or tubing involved?
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: MOTOR HEIGHT?

New, huh? 20% is kinda high for a new prop. Now, when you say the stern bracket is at the top hole does that mean the bolts are in the top hole (motor all the way down)?
 
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