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Author Topic:   repower
Ogden Dunes posted 05-28-2002 09:25 PM ET (US)   Profile for Ogden Dunes   Send Email to Ogden Dunes  
It looks like my 1977 85 Johnson is seeing the end of its life. Or maybe I do not want to put any more money into it (it's been a great motor)? I have a 1985 supersport and need some advice. The boat is rated for 100 HP. Should I go with a 4 stroke Yamaha or stick with a less expensive two stroke Johnson or Mercury. What shaft lenght does it take. What are the performance differences (fuel milage, waterskiing torqe out of the hole, top end speeds)? Is this a project I should take on myself? Also where would be the best place to purchase.

Or the big question should I sell it and upgrade?

To many questions too little time.

Highwater posted 05-28-2002 10:08 PM ET (US)     Profile for Highwater    
One factor that you did not mention was the difference in noise level between an old two-stroke and a new four-stroke. It is a significant difference. Honda's advertising is now based primarily on how quiet their engines are (Silence is silver). If you spend a lot of time on the boat, the noisy two-strokes may even have adverse long-term effect on your hearing. And the four-strokes are better for the environment (less air pollution and better gas mileage). The difference in top speed and hole shot will be minimal.
Ogden Dunes posted 06-03-2002 12:56 AM ET (US)     Profile for Ogden Dunes  Send Email to Ogden Dunes     
You Know your right about the noise. I was letting my 16 year old drive while I stayed on the beach. I could here the motor running about a mile away. Excelent comment!!!
andygere posted 06-03-2002 01:39 AM ET (US)     Profile for andygere  Send Email to andygere     
Your question is one of the most popular on the forum, and there is a lot of great info and discussion on this topic here. Set the time frame pulldown menu on the performance page to read "show posts for last 2 years" and start looking. For my money, the weight and price of 90-100 hp four-strokes would deter me from putting one on a 17, but many others here would disagree. Have fun researching...
Don Fisher posted 06-03-2002 09:45 AM ET (US)     Profile for Don Fisher  Send Email to Don Fisher     
Don't forget to check out the direct injected (and EPA compliant) 2 strokes - very quiet, great fuel economy, and strong performance.
masbama posted 06-03-2002 12:03 PM ET (US)     Profile for masbama  Send Email to masbama     
I have a 2002 Johnson 90 and it is as quiet as a 2 stroke can be. My friend has a 90 Merc 4 stroke and when at idle speeds his is much quieter (can't really hear it) but at high speeds it is about as loud as mine.

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