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Old 17 June 2013, 05:10   #11
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is it a solid floor futura or inflatable floor ? makes a big difference as to what power it will take .
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Old 17 June 2013, 05:36   #12
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30hp 2 stroke may pull a good skier up, a 4 stroke tohastu needs to rev to make power.... light and quiet, but poor botom end....
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Old 17 June 2013, 06:27   #13
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It's a solid aluminium floor, that sits on a inflatable keel, if has centre console and bunk trailer.
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Old 17 June 2013, 06:33   #14
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What do folks think about, between the pulling power of an old 40hp and a much newer 30hp, does the ware and tare reduce power as cylinder psi drops through use?? I.e would a much newer 30 be about as effective as an old well used 40 (1980-1990)?
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Old 17 June 2013, 07:22   #15
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Quote:
Originally Posted by NickHoult View Post
What do folks think about, between the pulling power of an old 40hp and a much newer 30hp, does the ware and tare reduce power as cylinder psi drops through use?? I.e would a much newer 30 be about as effective as an old well used 40 (1980-1990)?

Late 70's- early 80's motors were measured at the flywheel rather than the prop, so a vintage engine with a 25hp sticker would only be the equivalent of a late 90's 20-22hp 2 stroke.

Your question is virtually impossible to answer, I have a 20 year old engine that sat unused for 20 years, its as good now and as powerful as the day it was produced. However last year I bought a 20hp Yamaha that had had a very hard life, worn gears, poor top end and slow recoil, it was beaten on an identical boat by a 15hp Evinrude

Like all used boat things, only 3 things matter, condition, condition and condition.

To answer your question, a good 1990's 40hp will walk all over a newer 30hp. A knackered 1980 40hp will probably be about the same as a modern 30hp.
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