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Old 05 July 2004, 06:56   #1
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Country: UK - England
Boat name: Seashell
Make: Redbay
Length: 7m +
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Petrol and antifowl

Two questions for you....
1. I currently use standard unleaded petrol in my outboard. I was wondering whether putting the more expensive "super" unleaded would be better for the engine, and/or make me go faster.

Question 2. Can I risk leaving my boat in a tidal marina for three or four days without anti-fowling the hull. I wil be using the boat every day, so is nasty stuff likey to be able to grow in that short time?

Thank yuow!
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Old 05 July 2004, 07:12   #2
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Country: Ireland
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Boat name: XS-600
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As regards the antifouling, you should be fine, especially if you are using the boat every day.

The petrol! Well does using "super" unleaded really make your car go any faster? You're unlikely to notice the difference if any, except in your wallet!!

Higher octane petrols do make a noticeable difference to some Japanese import cars that were designed to run on 98(sometimes even 100) octane instead of the standard 95. So unless your motor is a Jap import, then I don't see the point.
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Old 05 July 2004, 07:15   #3
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Thanks for the advice.
Is there anyone out there who has kept thier boat in the water for a few days - what (if any) were the effects? (I really don't want to end up with a load of crud which I have to scrub off!)
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Old 05 July 2004, 07:24   #4
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Sorry Tim, forgot to mention that my boat has been in the water for 3 weeks now with not one sign of growth, but then the hull has been waxed with safeboatskin. Usually kept our last boat (which wasn't waxed) in the water for about a week at a time with no growth. Did leave her in for just over a month once and boy was I sorry. Took a total of 3 days to clean her properly. This was mainly down to the fact that she was only used at wkends during that time period. If you use her everyday you'll have no trouble.
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Old 05 July 2004, 08:21   #5
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Hull fouling

Tim,

My Searider is usually kept on a trailer but occasionally spends up to two weeks at a time in the water. After this time there is usually some fouling on the transom and engine but this comes off very easily. The hull gets a slight green tinge but this seems to disappear once the boat has been taken ashore.

Regarding the petrol, my car, a VR6 Corrado specifies 98 Octane and does run better on it - smoother idle, better top end and uses a bit less as well! However, it has anti-knock sensors that allow it to run satisfactorily on normal 95 octane - so, in effect the car can detect the quality of petrol it is being fed and adjusts itself accordingly - I don't think that any outboards are this clever yet. Most outboards are designed to run on 90 octane which is then further degraded by mixing in some oil. I always use Tesco unleaded in the boat.

Duncan
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Old 05 July 2004, 08:32   #6
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Thanks everyone. I will be quite happy leaving it on the water now!
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Old 05 July 2004, 08:33   #7
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well i filled my rib up this weekend i used shell super fast stuff and i think it went so much better that my back still hurts from the super speed or was it the fact i was raceing bilge rat and phil davies back to herne bay with no regard to how many times i went airborn

by the way i won

i must say i did think it went a little better with the super stuff

dan
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Old 05 July 2004, 10:52   #8
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Dan you only won because i ran out of fuel at the end of the pier and had to switch tanks anyway if you remember rightly i was running on half a prop aswell
You were much faster coming back as we'd lightened the fridge considerably over lunch
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Old 05 July 2004, 13:35   #9
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bilge rat

it was a fair race

its was all down to strategy

i made a fuel change early
take on a 50 hp with a broken prop
add some shell super fuel
fill all the other racers up with very heavy food
phil could not keep up due to not wearing his new aero geko helmet

and the vailant is the winner

got a very cool ssr number ssr111888 got my number

dan
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Old 05 July 2004, 16:20   #10
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Yes, but the Honda engine is better suited to endurance events rather than short circuits. Its superior fuel economy would have meant I could have adopted a splash 'n' dash fuel strategy where your 2-strokes would have necessitated two stops.

Furthermore, Bilge Rat's Evinrude reliability has been suspect all season which, coupled to his aggressive driving style, would inevitably have caused him to make a premature retirement. Anyway, you should have been black-flagged yesterday for dropping sausage rolls and sandwich crusts in the path of following RIBs in flagrant contravention of safety regulations.
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