Selecting a Prop for Westcoaster

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    Posted: 11 Sep 2003 at 8:48am
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Sea trialling 710 Westcoaster, 250 hpdi Yammaha

19" Yamaha prop delivers 5000 rpm, just.     Tried 21" prop but struggled for revs - 4300 rpm max.  Yammy specs suggest 5700 optimum.

Bloke I know suggested a Merc mirage prop might be the go.   Going to try raising engine a notch.

Suggestions anyone?

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Post Options Post Options   Likes (0) Likes(0)   Quote Dead Ant Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep 2003 at 1:21pm
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Billfish,
    If you're in Auckland it may be worth talking to Phil from the Big Fish Company in Pakuranga. I think he has a 710 WestCoaster as well as being the Auckland agent for them. He is always helpful on general fishing stuff so is probaly worth a call.
     Cheers
      DA
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Post Options Post Options   Likes (0) Likes(0)   Quote billfish Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep 2003 at 6:52pm
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Cheers Deat Ant.  Phill sorted it out for me today at Halfmoon Bay.  17" Mirage works perfect.  Bring on the game season.  
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Post Options Post Options   Likes (0) Likes(0)   Quote Dead Ant Quote  Post ReplyReply Direct Link To This Post Posted: 11 Sep 2003 at 10:46pm
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Billfish,

     What's your plan for targetting game fish - East, West, North or all of the above?  I'm an extreme novice but would like to get out and chase some Tuna for starters but wouldn't mind a bit of guidance as to where and when.

     Cheers

        DA

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Post Options Post Options   Likes (0) Likes(0)   Quote billfish Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2003 at 7:20am
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Dead Ant,  I'm based in Auckland but plan on fishing "all of the above" althoght the main purpose of the westcoaster is to hit the Manukau and Kaipara bars to get after some of that un-pressured resource before the bastards in Wellington stop us.

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Post Options Post Options   Likes (0) Likes(0)   Quote Naki Quote  Post ReplyReply Direct Link To This Post Posted: 12 Sep 2003 at 7:42am
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Billfish.

I'm jealous of your WestCoaster, bloody awesome boats. A mate of mine has an earlier 5.5m and they go places where a lot of bigger boats fear to tread.

We have a Yammie 115 4 Stroke with a 19" prop and it will only pull 5000 rpm. Talked to our Yammie dealer and he said we should try a 17". Just wondering how much top end you lost with the 17".

 

Is the Mirage a 3 or 4 blade prop?

 

Cheers

President of the "Pontoon Owners Club".
I started off with nothing and now I still have most of it left!!!
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Post Options Post Options   Likes (0) Likes(0)   Quote billfish Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2003 at 7:27am
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3 blade mirage.  No real loss in top end.  Revs to 5600 giving 40 kts.   Tried 4 blade- was smoother for sure and lots more fuel efficent but reduced overall speed by 5 kts.  Little bit of slippage too.   Seems 3 blade 17" best all round choice but could see good reason for having both.
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Post Options Post Options   Likes (0) Likes(0)   Quote JBoffshore Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2003 at 10:43am
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is it much of a task to swap them over before heading out? i would have thought this would be good for if you were planing on goint out and trolling plastic etc?

b.m

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Post Options Post Options   Likes (0) Likes(0)   Quote R2D2 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2003 at 9:18pm
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Naki,

I went from a 19 to a 17 on my Yammie 115 2 stroke, revs went from 5000 to 5400 max and lost maybe 2 ks top speed. I read somewhere that 1 " of pitch is worth about 200 revs, seems to be the case with mine.  Don't know if the comparison is valid for a 4 stroke tho.

JD

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Post Options Post Options   Likes (0) Likes(0)   Quote Naki Quote  Post ReplyReply Direct Link To This Post Posted: 16 Sep 2003 at 10:35am
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JD

Thanks for that. May give a 17" a go.

President of the "Pontoon Owners Club".
I started off with nothing and now I still have most of it left!!!
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