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  Stats on a 13' 25hp

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Author Topic:   Stats on a 13' 25hp
Digs1622 posted 06-24-2002 10:55 PM ET (US)   Profile for Digs1622   Send Email to Digs1622  
Ok, I have asked this question before (I have a 91 13'ss 25hp evinrude) and yes, I top out at 25mph, give or take depending on weight. But I am curious at the rpm speed I should be levling out at? I usually keep her at 5000rpm when i need to move...4000rpm at cruise speed. Is this normal? Im asking only because I can push it to 6500rpms, but I dont want to upset my engine...and prefer to keep the rpms down. Being my first boat, I just dont want to make any mistakes.

Digs

Bigshot posted 06-25-2002 09:46 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
No wonder....you are underpropped. redline is 5500 I believe on that. You should be doing about 30. What size prop? How accurate is tach?
Digs1622 posted 06-25-2002 11:31 PM ET (US)     Profile for Digs1622  Send Email to Digs1622     
prop is 10x13...it is possible the tach is off but im just not positive. I do know after running out of gas twice..that the fuel meter is on the blink:)
Bigshot posted 06-26-2002 09:37 AM ET (US)     Profile for Bigshot  Send Email to Bigshot     
Tach is off....that prop should be about perfect on that setup. Have the tach checked. Redline is 5500 but anywhere around 5000+ with no load is good.
Tom W Clark posted 06-26-2002 11:07 AM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Digs1622,

Put a volt meter on the terminals on the back of the tachometer and see what the voltage is. If it's 18 or 20 volts then it's getting too much voltage and it will thus over register.

It is also possible that although your prop is stamped as a 10x13, it may not be. It is also possible the the blades are worn down enough that the blades are now too small and havenít enough surface area even if it is otherwise undamaged. Have a prop shop check it out if the tach proves to be OK.

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