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Old 24 September 2010, 10:50   #1
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4m searider speed?

I have just got off the baot in Portland Harbor and thought I would get a general idea of what you guys get from your 4m Seariders. My GPS (I know I am on FIBnet ) said 34.7knts. I was shocked as I didnt think they were that fast.
I have an evinrude 50hp 2 stroke (E50RNLIB) Not allot else on there to be fair. I was 2 up, with 25ltrs of fuel and draining.
One thing I can say is that my twin 5.4m SR could not keep with it. However it was a little bit rough out there being a southerly force 4. (It soon shot past as we slowed down) Great fun though
I am impressed with the 4m. I might have to go out again on her Mon. Its a shame I am selling it.

Sorry if there has been thousands of threads with the same question. Just very curious.
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Old 24 September 2010, 11:17   #2
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Country: UK - England
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They do fly along, that sounds about right.
I know when I was out with Bam Bam (3.2m Zodiac 40hp) and a mate (4.5m Narwhal 60hp) my little SR4 was the quickest, right upto the point it fell to bits!
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Old 24 September 2010, 12:17   #3
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[ SR4 was the quickest, right upto the point it fell to bits! [/QUOTE]

Was that with the twin pot yammy 55hp? I had that engine on my 5m humber assault. Great engine, crap boat.
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Old 24 September 2010, 12:53   #4
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Yep that was with the Yam twin pot. I've found my GPS now so will be able to see what it does next time out...
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Old 24 September 2010, 13:21   #5
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The 4m certainly put a smile on my face. I compared it to my MK1 Rigid Raider with a 140 on the back, smal boat with a big engine = Great fun
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Old 24 September 2010, 17:47   #6
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I got 40 mph out of mine (40 hp Yamaha two-stroke) with two people in it. It starts to chine walk pretty bad at that speed though.
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Old 24 September 2010, 19:08   #7
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Quote:
Originally Posted by russiarulez View Post
I got 40 mph out of mine (40 hp Yamaha two-stroke) with two people in it. It starts to chine walk pretty bad at that speed though.
I got chine walk with a 60hp clamshell but none with the 55hp twin pot? It feels a better boat with the Yam.
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Old 24 September 2010, 20:40   #8
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I was going to start a thread about this but you have the perfect one going. I have a sr4.0 that I just got a motor for. it is a 2003 50 mercury carberated. The motor came with a 12 pitch prop and the first time driveing it I hit my rev limiter at just about 30 mph. I am trying to dial the prop in but the last time I was out I had a aluminum prop that was a 17 pitch with an aggressive cup. I maxed out at 43 mph but was only taching at 5000 rpm, I was alone with only a battery and about 4 gallons of gas, stock jocky console. at about 40 mphs the boat started to porpise a bit then would want to chine walk A LITTLE. There is a dolphine foil mounted on the motor and plan on taking that off to see if it stops the porpising. It felt like a wild stallion at that speed and i was on a flat pond with the only wakes from my boat. I have a 5.4 and the 4.0 definately is at least as fast. I am haveing a stainless steel prop one set for about a 16 pitch with the hope of bringing the rpms to about 5300. I think motor is about 5400 max rpm. I will update when I get the new prop ready.
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Old 25 September 2010, 03:27   #9
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good luck with that. I had a giggle cracking 34knts in choppy sea. i bet its even better in millpond conditions
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Old 26 September 2010, 06:30   #10
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I get 36 knts gps with 2 people and all the gear and fuel on board. My engine is a 2000 model 40 hp Mercury 2 stroke with power trim and has a 15 p prop at the moment but is over revving to 5800 rpm so am now looking for a 16 p stainless prop Yam or Merc. I dont get really bad chine walking, just ease back a bit or alter trim. I think a lot is down to the weight balance in the boat and set up and condition. My engine is raised at 1 ".
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