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Old 06 April 2011, 18:04   #1
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What Size Prop? Mercury Optimax Saltwater 135 on Parker 630

Hi guys,
I need to order a replacement aluminium prop for our club's RIB

The RIB is a Parker 630 with a Mercury Optimax 135 Saltwater.

Can anyone advise on: 1) What size/pitch to buy for general cruising? 2) Where to buy from online? (Nothing local here in West of Ireland)

Looking for one complete with hub so it will just fit directly on. I'm not up to speed with the Mercury hub so any advise on where to buy a complete kit would be much appreciated.

Thanks folks
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Old 06 April 2011, 18:53   #2
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Can anyone advise on: 1) What size/pitch to buy for general cruising?
the same size as it currently has unless there is some problem with the current set up (in which case you need to post the usual, RPM, speed, gearbox ratio, suggested max revs, prop size stuff).

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2) Where to buy from online? (Nothing local here in West of Ireland)
http://www.brunswickmarineemea.com/ Select dealer network, there are several in Ireland, with the first on the list being in Galway.
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Old 06 April 2011, 19:44   #3
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There are no identification marks on the current stainless prop, hence the query really.

Engine tops out around at normal WOT RPM i'm told.

We need to replace with an aluminium.

That Galway dealer will not have anything in stock, I know the business.

Apologies for the scarce amount of technical detail, I guess the lack of knowledge is the whole reason for my query
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Old 07 April 2011, 03:18   #4
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There are no identification marks on the current stainless prop,
that would be unusual - have you checked the side that is against the leg/shaft? Failing that I'd be getting my tape measure out with a hope of more accuracy than a guess on here from people running similar sized boat / engine combos.

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Engine tops out around at normal WOT RPM i'm told.
thats a rather a vague claim though. "normal RPM" - so what 5000-6000 rpm? or recommended max rpm for that engine.

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That Galway dealer will not have anything in stock, I know the business.
Very few dealers will have (m)any props in stock - but most will be able to order one for you within a day or two (or a week if he is consolidating with other stuff to avoid shipping charges on your order); he might even have the tools to measure your existing one. It probably won't be the cheapest way to get a new prop but with only half the information it might be better than having to buy twice.

If you know your maximum speed, look up the gearbox ratio, and are prepared to make a guess at WOT RPM then you can probably guess the prop pitch based on 10% slip. There are various prop calculators online to make it easy for you. But it would be worth testing for real rather than relying on others numbers for revs and speed.
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Old 07 April 2011, 04:46   #5
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Give Simon a ring at Ribsmarine in Christchurch, Dorset. He's a good guy with a fair amount of stock and should be able to advise.
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Old 07 April 2011, 06:07   #6
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Polwart - you have failed to read between Alt's lines. "Dealers" in most of Ireland are of little use other than Warranty (where return to manufacturer is called for). In general, they have little knowledge of their products and hold no parts or stock. To get that prop, they'll take a guess, order it up from Brunswick by air courier, slap on their markup and 21% VAT. If it doesn't live up to expectation, they'll talk sh1te and hope Alt gives up on it. He's right to buy direct.

There are a few notable exceptions across the country, but they are far between. The Mariner dealer in my neck of the woods is a crook, pure and simple. I wouldn't buy unsealed two stroke oil from him
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Old 07 April 2011, 07:42   #7
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We just took the RIB out of the water now and the only marking on the prop is 'TS1070'

I'm putting on my Google hat and going to try and do some research. In the meantime, if this number means anything to anyone please do feel free to share

When I type TS1070 into: http://www.tacomapropeller.com/177/c...Reference.html I get the following options:

14-1/8 X 19
14-3/8 X 18
15-1/4 X 19


The boat is a training boat and general cruising prop would be best suited. So I guess the best option may be the 14-1/8 x 19 would be a safe bet.

So now what I guess i'm looking for is a 3 Blade Aluminium prop with dimensions 14-1/8 x 19 that will fit directly onto a Mercury Optimax 135 Saltwater

Aaahh the powers of Google.

If anyone can make a recommendation for an online shop please feel free to share

-EDIT- http://www.shipstore.com/SS/HTML/TYP/TYPTS1070.html brings up TS1070 as being 14 x 19 3-blade SS

There's plenty of new Alum 3-blade 14 x 19 props on eBay for 120-130 with a hub to fit directly onto a Mercury Optimax (Flo-Torque hub kit)
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Old 07 April 2011, 09:19   #8
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Give Simon a ring at Ribsmarine in Christchurch, Dorset. He's a good guy with a fair amount of stock and should be able to advise.

What Steve said - he will know straight away what will probably work out of the box & fit with no probs . Give him your card number and he will bung it in the post. Knows his stuff.

or call one of thr ribnet trade members who know about mercs ....
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Old 07 April 2011, 09:22   #9
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or call one of thr ribnet trade members who know about mercs ....
is turbodiesel still doing 10% off?
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Old 07 April 2011, 10:27   #10
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Why ali, the v6 opti has a ss prop from standard, so we fit ss, we have only fitted one ali prop to a v6 opti and it was a bag of **** so we changed it back to ss and it was fine.

If you go ss, we have them on the shelf
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