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Old 08 June 2008, 12:54   #21
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Country: UK - England
Town: Highcliffe
Boat name: No Name
Make: Ocean
Length: 4m +
Engine: Johnson 50 4-Stroke
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Posts: 39
thanks
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Old 10 June 2008, 13:53   #22
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Country: UK - England
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Boat name: Yoda & Obi Wan
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Quote:
Originally Posted by ali_seton View Post
5hrs of going 4 knots!!! THIS CANT BE RIGHT!!!

I agree this can't be right, what were you doing that meant you had to go so slow
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Old 11 June 2008, 07:27   #23
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Country: UK - Scotland
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Hang on a minute. It may be absolutely spot on!

4 knots is going to be a fair old displacement speed at low - mid throttle depending on the boat size. Remember ribs (or anything witha transom) are not particularly efficient through the water when not on the plane.
28 at todays prices is about 24ish L, so maybe 5 hours at maximum inefficiency on a 40Hp isn't too bad?

IF the engine is a 1990 model chances are it's going to be a traditional 2- stroke, which compared to a modern engine at that speed and load will drink.

So, some more questions:
How big is the boat?
When you were travelling at that speed were you creating huge waves?
Where was your throttle? (tickover, quarter open, half open,....)
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Old 13 June 2008, 13:46   #24
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i was in the harbour!!!!!
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