1997 evinrude 50 prop choice.

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steviecops

Chief Petty Officer
Joined
Oct 3, 2003
Messages
585
Re: 1997 evinrude 50 prop choice.

Sorry to jump in here, but is the tach setting recommended on this thread the same for an old 1980 2 cylinder 55hp? My engine has a rectifier but the tach is set on 6, which is what I was told to set it on. Should it be set on 5 or 6?<br /><br />Thanks<br />Steve
 
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michaelj1978

Seaman
Joined
Jul 8, 2004
Messages
50
Re: 1997 evinrude 50 prop choice.

Well the prop was a success. I took it out saturday night for a run at the lake. First with the 15pitch prop, then the 19.<br /><br />Boat is a Fisher Marine 18 foot flat bottom aluminum. Interior is fully decked out(storage/seating) and we had myself (200lb) my friend (230lb) and all of our gear, including a big cooler full of beer. Also there are 3 batteries and a topped off 6 and 2 gallon tank to give you an idea of the weight of the boat. <br /><br />I also hooked up the GPS (eagle 320) with the hotmaps which worked great. If you don't have GPS and a map like this get one!<br /><br />With the 15 pitch I was only able to hit 19.3mph without the motor starting to over rev. Took off the prop and threw on the 19 pitch and we topped out at 26.9mph. I don't think this boat's ever been that fast! Felt like a whole new boat. Motor ran great and sounded like a motor should. We had no problem getting the boat to plane and once up, tilted the trim back and skimmed the rear 1/4 across the water.<br /><br />Water temps were also in the low 50's and we had a little wind. I think on a warmer day with less wind, less weight in the boat, I might be able to hit 29-30mph.
 
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moderator1

Lieutenant Commander
Joined
Dec 5, 2002
Messages
1,668
Re: 1997 evinrude 50 prop choice.

The most important item is that you reach Max recommended RPM...speed means nothing. Gotta know what the tach says or we'll be puttin' another engine on that boat.
 
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michaelj1978

Seaman
Joined
Jul 8, 2004
Messages
50
Re: 1997 evinrude 50 prop choice.

I played with all the settings on the tach and it still read high. The motor still had enough power to cavitate/ventilate and still spin really high. I'm taking it in this week to get another tach hooked up and a full service on it.
 
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