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Old 09 March 2015, 07:57   #11
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Country: Canada
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ya dont want to mess with the engine just would like to change the prop .. so i get full speed and loose tork .... but i dono how far to go with it .....and dont have the money to just go bye a few props
stock 50hp everrun.
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Old 09 March 2015, 08:00   #12
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Have a look on boat mad, always props for sale or someone who can help
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Old 09 March 2015, 08:24   #13
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hey roflhat back on the net been awile back at looking at making this boat faster ... the motor is new and working fine but just not fast enough do u think a cleaver prop would help for speed like maybe a 10.25 x18 ..
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Old 09 March 2015, 12:53   #14
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Have you had the propeller worked? Only costs about 60 amd will make a world of difference. Sharpen and thin the blades and get the edges cupped to stop cavitation in the bends.
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Old 12 March 2015, 05:55   #15
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If you're after good numbers with a stock engine you want to find yourself a decent Mercury 11x18p cleaver or 10 3/8 x 18p chopper. The choppers were originally for 10 spline 25hp but most have been resplined to take 13.
Both of them should give you about 56mph when set up correctly.
Yamaha make some good props too, 19 and 21G cleavers, which are also very good, although slightly tall for a standard 50.
If you're after even top speed (you will be ) then you could go for a 20p cleaver, still 11" diameter. The acceleration will suffer but you'll be going close to if not 60mph then.

Genuine merc props will always work well out of the box, although you can fine tune them to your application. You may have heard of Ron Hill, he makes all sorts of props but they're a bit of a gamble. Some are stinkers and some are beauties. Upto you, but I'd always go genuine merc props unless you buy a used prop that you know is balanced and works.

Unless your crew weight is very light 10.25" diameter is not ideal for a cleaver. It works on the chopper because it has over hub exhaust, so more blade area.

If you just want a bit more bite and slightly better top speed then do as Luke says. Money spent tuning propellers is always better than money spent tuning the engine.
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Old 12 March 2015, 05:58   #16
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Post some photos of your setup here if you can, have a looksee.

I sent tohatsu and email about the MX50D2 when it came out, but they keep their cards close to their chest...
Says it more durable, maybe they addressed the weak engines mounts and crank? Would make an ideal thundercat engine then

couple choppers for sale on boatracingfacts just now -
http://www.boatracingfacts.com/forum...silver-chopper
http://www.boatracingfacts.com/forum...er-II-for-sale

The first one doesn't say if its 10 or 13 spline, youd need to check that
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Old 16 March 2015, 15:25   #17
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ok sounds good will get a prop soon as i can find one. and pic wount be able to get the boat outa the basement tell the snow is gone but soon as it is will be back on here to post pic. had 1 more question my exause is through my prop now so when i do get a new prop dose it have to be a through the center as well. .. prob a stupid question
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Old 16 March 2015, 16:12   #18
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Doesn't have to be, if you get a cleaver it'll most likely be through hub (same as standard props). Choppers are over-hub (exhaust exits over the blades) giving you slip, so your acceleration will improve if you release the exhaust above the prop, i.e. above the cav plate.

It is a lot louder with above prop exhaust, so you could just leave it standard. Or if you drill 1" holes you can get rubber plugs to put it them when you want a quiet drive
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Old 16 March 2015, 18:24   #19
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some pic from last year
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Old 16 March 2015, 18:29   #20
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good summer it was
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