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Old 07 July 2008, 01:52   #21
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A Stiletto has to be driven a few inches higher than you are doing. If you drive it too low you get much less RPM and more chinewalk. 1" could make 300 rpm more....
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Old 07 July 2008, 01:58   #22
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A Stiletto has to be driven a few inches higher than you are doing. If you drive it too low you get much less RPM and more chinewalk. 1" could make 300 rpm more....
it ventilates ALOT. i only have to trim a little to get on plane.... if i ran it any higher, i dont think it would need trim at all.
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Old 07 July 2008, 08:07   #23
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it ventilates ALOT. i only have to trim a little to get on plane.... if i ran it any higher, i dont think it would need trim at all.
Mmmm strange, I know someone who drives that prop with the anti-caviation plate 4" above the keel...

In that case a SS prop with less cup is better yeah.
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Old 13 July 2008, 00:58   #24
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lowered the motor so its now ONE hole up.

had the prop changed from 17~19 to 16~17

5000 to 5100 rpm. raised ONE hole. 40mph and 4mpg! @ WOT!!! thats LOADED with 26 gallon fuel, fishing poles, ice chests, anchors, storage locker, t-top and 2 up......
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Old 05 August 2008, 07:24   #25
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Prop

What do we reckon the ideal situation for prop / adjustment is then?

I am running the same setup and hitting around 45mph with 2 up, full load of fuel at 4600rpm on standard prop.

Burning 4gal/hr at 3500rpm
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Old 05 August 2008, 07:25   #26
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What do we reckon the ideal situation for prop / adjustment is then?

I am running the same setup and hitting around 45mph with 2 up, full load of fuel at 4600rpm on standard prop.

Burning 4gal/hr at 3500rpm
i dont think 4600rpm is that good, i have been told you should hit 5000~5200.
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Old 05 August 2008, 16:39   #27
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What do we reckon the ideal situation for prop / adjustment is then?

I am running the same setup and hitting around 45mph with 2 up, full load of fuel at 4600rpm on standard prop.

Burning 4gal/hr at 3500rpm
Thats about the same as i was getting with the standard 17" prop and engine was labouring a bit a slow cruising speed . i fitted a turningpoint stainless 15" pitch and the revs went up to about 5200 , top speed didn't improve but holeshot and midrange was much better and the fuel consumption improved a lot , probably 25% better
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Old 06 August 2008, 08:05   #28
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Burning 4gal/hr at 3500rpm
something not right there,.. I know mine is a four stroke but its only using 10litres / hour on a 5.7 Hull at higher revs
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Old 06 August 2008, 14:10   #29
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I have never worked out what mine uses in an hour , just roughly how many miles i have done and what it takes to fill up . My comment meant I was getting the same prop performance .

10 litres an hour sounds very frugal but I guess for an average day out we probably are actually motoring for about 3 hrs and I usually use about 30 litres of fuel but 3 hrs at say 25knots is about 75 miles and i reckon mine does about 1/2litre a mile so not far off then
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