Forum: Engines & props
02 September 2005, 15:04
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Replies: 21
Views: 4,631
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Forum: Engines & props
02 September 2005, 14:53
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Replies: 2
Views: 1,255
Chris,
I have an Osprey 18 (about 1988) which...
Chris,
I have an Osprey 18 (about 1988) which I'm told is the fore runner to the Sparrowhawk. I don't really know the Sparrowhawk but if your nose is as flat as mine, 35 in a half decent swell is...
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Forum: Engines & props
02 September 2005, 14:33
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Replies: 21
Views: 4,631
Thanks all,
Great to have all the opinions. The...
Thanks all,
Great to have all the opinions. The general view seems, top it up, mix it up, seal it & shove some additive in if it's going to lay a while. However, do we have any scientists out there...
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Forum: Engines & props
01 September 2005, 13:06
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Replies: 5
Views: 1,503
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Forum: Engines & props
01 September 2005, 12:59
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Replies: 21
Views: 4,631
Fuel Degredation
This could spark a few disagreements but your opinions would be good....
A car mechanic & former outboard owner recently agreed that unleaded fuel degrades quite quickly & that I'm right in not...
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Forum: Engines & props
01 September 2005, 12:46
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Replies: 6
Views: 1,869
I have a Selva S1400 from 1994. Just to confuse...
I have a Selva S1400 from 1994. Just to confuse matters, I got an alloy prop for a Johnson which fits & works perfectly. Apparently they share the OMC gearbox. However Steel Developments (London) say...
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Forum: Engines & props
22 August 2005, 14:16
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Replies: 12
Views: 3,494
Sorry to say it, but someone once told me that...
Sorry to say it, but someone once told me that prop choice is a bit of a black art. I've tried various prop calc tools. The last one told me to use a 17p, however trial & error showed me that a 15p...
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Forum: Engines & props
22 August 2005, 14:09
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Replies: 1
Views: 1,636
Here's my old Selva again!
G'day all,
I had a good weekend thrashing into some quite heavy seas. Finally, the old girl is running & planing well. Now getting +30 knots which is plenty for the boat design. Problem is, I was...
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Forum: RIBs & ribbing
25 July 2005, 15:54
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Replies: 9
Views: 7,304
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Forum: Engines & props
21 July 2005, 18:50
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Replies: 23
Views: 5,223
Selva probs
Pete,
Divers like food n drink too much. I'm not so small myself! Problem is, we break boats quicker than we can repair them. You guys should have seen the sea state at the Farnes (NE England)...
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Forum: Engines & props
19 July 2005, 12:47
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Replies: 23
Views: 5,223
Selva probs
Pete,
Thanks for the advice again. I'm trying to avoid lifting the engine, not because it's difficult (I have access to full workshop facilities including a crane), but for 2 other reasons. Firstly,...
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Forum: Engines & props
18 July 2005, 17:19
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Replies: 23
Views: 5,223
Selva - another problem!
All,
Thanks for the many bits of advice. I tried the easiest thing 1st and did a bit of prop switching. I went down to a 15 from a 17 pitch. It worked!!!!
So that saves having to lift the lump...
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Forum: Engines & props
29 June 2005, 19:39
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Replies: 23
Views: 5,223
Selva Overrevving
Thanks guys,
I'll give it a go & post the results.
However, I need educating (if you don't mind that is). In my very limited sense of logic, I would imagine that the further away the prop is...
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Forum: Engines & props
29 June 2005, 07:37
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Replies: 23
Views: 5,223
Selva Overrevving
Pete et al,
I've done some measuring & taken a few photo's (attached). The height of the transon at it's lowest cut away point at the top, to the base of the vee is 50.5cms. The cavatation plates...
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Forum: Engines & props
27 June 2005, 15:37
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Replies: 23
Views: 5,223
Selva Overrevving
Pete / Alex,
Your input is very much appreciated. I'm glad I found this forum, very good to hear of like minded people actually prepared to help without trying to sell you something. Most...
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Forum: Engines & props
27 June 2005, 14:02
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Replies: 23
Views: 5,223
Selva overrevving
Pete,
Thanks but I'm already at the lowest point. Any more & I'd have to cut down on the transom. I'll gladly do it, but I don't want to do this & find that I'm cutting away a perfectly good piece...
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Forum: Engines & props
27 June 2005, 13:43
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Replies: 23
Views: 5,223
Selva Overrevving
Hi all,
I have a Selva S1400 / 100hp (1994) fitted to a narrow beam Osprey 5.5m rib (approx 1988). She used to have a Merc 80 blue band (1969) on her tail. The Selva runs well, & jumps up onto the...
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