Classic AquaSport

Aquasport Mechanicals - things that need a wrench, screwdriver or multimeter => Engines & engine woes => Topic started by: REELCLIMAX on January 22, 2008, 10:13:32 AM

Title: new motor
Post by: REELCLIMAX on January 22, 2008, 10:13:32 AM

I was just wondering about putting a bigger motor on my boat. The boat is a 74 17 foot aquasport cc. It has an 82 90 hp evinrude now and I would like to put a 97 115evinrude on it. Does everyone think that would be ok. Also have a 175 that I would love to put on it but Im sure that its to big and heavy. I would appreciate the advice.RC  :)

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Post by: Capt. Bob on January 22, 2008, 12:05:03 PM

I had a 1986 17' with a Johnson 115hp. Ran great but....
in light of the cost of fuel these days a 90hp may be a better route in the long run.
The 115 ran its best when I had four grown (overgrown really) men aboard. That's when the extra ponies come into play.

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Post by: Mad Dog on January 22, 2008, 03:51:19 PM

Is there any real difference in the weight of the two engines?  I don't kow about fuel economy but you don't want to change the balance of the boat too much.

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Post by: RickK on January 22, 2008, 06:46:15 PM

Typically the 90 and 115 are the same block with some carb work to make it a 115 - so not usually any weight difference between the two from the same manufacturer.  Your motor's years are very different though which could change the weight but I wouldn't think that it would be that big of a problem.  You'll gain a few mph with the 115.

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Post by: dusky on January 26, 2008, 01:32:30 PM

RC

Look back to my post last year.  After much debate I put a 70 hp 4S Suzuki on my 87 17ft Sport.  It replaced a 115 hp 1983 Merc.  

I love the performance and economy for fishing, not sure if you are looking to do watersports.

Dusky