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Old 03 October 2009, 14:55   #11
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Originally Posted by chewy View Post
More sheep?
actaully, it's Possums we have lots off - something like 4 million people, and 90 million possums. It's almost like they're trying to take over.......
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Old 03 October 2009, 15:17   #12
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Cleam them dipping the whole plug tread in acrylic thinner for 5 minutes, scrape the dirt/sticking oil with a tooth brush, regap, clean cylinder inside threads in circular motion using a sushi stick, (like a big cotton swab) dampened in thinner, place lower cylinder plug in upper cylinder, and viceverse, rotate them in every maintenance service.

If you boat constantly, clean plugs every 50 working hours, if using a hour meter, the best. In 10 more hours my original plugs will have 250 metered worked hours, electrode looks surprisingly well as overall plugs. Like to cruise at 3/4 to wot throttle most of the time, correct gas/oil ratio is a must perform, these 3 issues are part of the package for their long longevity. But nothing is eternal, have a pair of new ones ready.

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Old 03 October 2009, 16:15   #13
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The plugs are only 60 hours old, and are very expensive,
Cheers
What plugs are they?
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Old 03 October 2009, 19:37   #14
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What plugs are they?
NGK BPZ8H‑N‑10

Normal off the shelf plugs are about $8 here in NZ - these are $21 each.
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Old 03 October 2009, 21:29   #15
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Originally Posted by rjbathgate View Post
NGK BPZ8H‑N‑10

Normal off the shelf plugs are about $8 here in NZ - these are $21 each.
BPZ8H-N-10 will be :

B-14 mm thread
P-Proyected Insulator Type
Z-21 mm thread reach
8-Cold term
H-12.7 mm (1/2") socket
N-Special side electrode
10-1 mm gap (.040")

What would normal off the shelf plugs be : BR-7HS-10, BP6HS-10 ?

Happy Sibbing
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Old 03 October 2009, 23:27   #16
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BPZ8H-N-10 will be :

B-14 mm thread
P-Proyected Insulator Type
Z-21 mm thread reach
8-Cold term
H-12.7 mm (1/2") socket
N-Special side electrode
10-1 mm gap (.040")

What would normal off the shelf plugs be : BR-7HS-10, BP6HS-10 ?

Happy Sibbing
I mean by off the shelf, I had to order my plugs in specially as they are not common, and not standard stock items I can pick off shelf... hence the price...
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Old 04 October 2009, 14:35   #17
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So that's the factory recommended plugs, a pity that BR-7HS-10 can't be used, other Yamaha models use this one. What about Champion brand compatibility ?

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Old 10 October 2009, 04:40   #18
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I mean by off the shelf, I had to order my plugs in specially as they are not common, and not standard stock items I can pick off shelf... hence the price...
You're not wrong, special order from my NGK supplier...
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Old 12 October 2009, 10:03   #19
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I knew there was a reason I emmigrated to New Zealand!
My brother in law lives there - on the West coast opposite Auckland, havn't been to Tauranga but it looks like a great boating spot - any photos?

Will be over again next November ish I think!
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When a boat looks that good who needs tubes!!!
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Old 12 October 2009, 21:21   #20
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My brother in law lives there - on the West coast opposite Auckland, havn't been to Tauranga but it looks like a great boating spot - any photos?

Will be over again next November ish I think!
Yup, it's pretty nice here -- pretty much eveyrone and their dog has a boat over here... although not many ribs - most are into their fishing so have themselves big tinnies etc...

few pics of the area attached...
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