Evinrude 9.5 vs 8hp speed test

[jimmbo]

Yes, they put performed them in performance unless you couldn't get them to start!

Just saying.

Mine always started, even when one of the Switchboxes failed.

 

[saltchuckmatt]

We raced the Evinrude 9.9 against their 9.8 on water skimmers and they always won...then my uncle showed us that the 15 cowl would fit on the 9.9 motor.

They could never figure out how we could beat them!

 

[rolmops]

Forktail​

Ensign​

Joined Feb 11, 2002 Messages 977

• Sep 3, 2004

Re: year of HP ratings change. prop VS. crank

ICOMIA Standard 28-83 was developed in 1983 (thus the -83 signification of the standard).<br /><br />The standard was developed because of the inconsistencies between some manufacturers rating their outboards at the prop and some at the crank.<br /><br />The hp losses due to prop ratings are minimal. 2-3%, maybe 5% at most. 10-15% is unreasonable as there is only one gear reduction and only a few bearings. You're simply not going to lose 20-25 hp to the prop on a 200 hp outboard.






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[JimS123]

Yes, they put performed them in performance unless you couldn't get them to start!

Just saying.

If you wanted to get there real fast and look cool, you bought a Merc. (think tower of power)

If you wanted to get back home again, you bought a JohnnyRude.

 

[jimmbo]

If you wanted to get there real fast and look cool, you bought a Merc. (think tower of power)

I had a TOP, but I would rather have had a V6.
In 1975 when the V6s were first introduced as Production Motors, the Merc certainly put the OMC to shame, even if it was rated 25 less HP. It however was a totally new Engine, unlike the OMCs, which were just 2 more Cylinders stacked on top of the V4

 

[flyingscott]

I have a 1970 9.5 on a 14' tinny. One vacation I replaced it with a 1984 9.9. The difference was negligible.

One thing I can say about the 9.5, though. It simply runs and runs and is probably the best OB I ever had.

I do not believe that for one minute. The 9.9 was a significant power improvement over the 9.9.

 

[jimmbo]

I do not believe that for one minute. The 9.9 was a significant power improvement over the 9.9.

There's an Apples to Apples Comparison

 

[flyingscott]

There's an Apples to Apples Comparison

Ooops my bad meant 9.9 is significantly more powerful than a 9.5.

 

[909]

Agreed. The old 9.5 felt like a 5. The next gen 9,9 felt like a 10. The last gen 9.9 feels like a 15.

 

[jimmbo]

Ooops my bad meant 9.9 is significantly more powerful than a 9.5.

The 9.9, when it came out in 74, was probably putting out about 11 1/2 - 12 Hp, while the 15 was probably close to 15