300x torquemaster versus sportsmaster

[richlewis]

hi there guys i need some help on lower units for a 2002 20inch 300 x merc.can anyone tell me the difference in performance beetwen the torquemaster and sportsmaster.at the moment the motor has a 1:75:1 torquemaster,there is also a 1:62:1 sportsmaster available,what exactly do these figures mean,i know that they are gear ratios but that doesnt tell me a laymam what exactly they mean,for example will a 300x sportsmaster be faster than a 300x torquemaster,will one be quicker top end ,the other quicker out of the hole,would i gain anything by changing from one to the other.

regards in advance

[Scream And Fly]

Rich,

The numbers in question refer to the gear ratios of the lower units. That's a consideration relevant to the gear ratio of your current setup in terms of propeller pitch.

Which lower unit would be better? That depends on your boat and setup. We performed that very test in question, and found that on boats capable of speeds above 80 mph, the Sportmaster is the ideal choice - for performance and safety reasons.

For boats that are not capable of easily reaching 80+ mph, the Torquemaster/Fleetmaster will provide more speed and more bow lift.

The best question to ask is what your specific application is (engine height, boat, weight, propeller, etc.), and what speeds are you attaining?

Greg

[richlewis]

thanks for your reply greg

at the moment the engine is not yet rigged to the boat and is sitting in my garage.it has a 19 pitch laser 2 on it at the moment with torquemaster

this motor will be replacing a 200hp xr2/sst120 2litre motor current set up 75mph,cmc powerlift with 6 inch setback,23 pitch laser 2 prop,20 foot phantom race boat,similar to say a cyclone /bernico/hydrostream hope this helps.what do you think know all help gratefully recieved

ps also do you know if i should loose the powerlift and go for transom mount on the 300x due to the extra weight involed with this monster

regards

rich

[Markus]

If you are going to run the engine on a fairly light boat like that, you would definitely like the Sportmaster better than the Torquemaster. Not because of the gear ratios, but because of the shape of the lower unit.

However, adding a nosecone to the Torquemaster will be a lot cheaper than buying another Sportmaster and can potentially give even better performance.

As to the amount of setback, experiment to see what works. That is the only way.

[richlewis]

thanks for your reply markus

do you think the powerlift is strong enough to handle that kind of power.and weight

also who would you recomend to ghange the nosecone in the uk as most of the ones i have heard of are in the us,mainly bobs nose cone


regards

rich

[Markus]

The CMC powerlift that is made from stainless steel is very strong and should definitely be able to take 300 hp. I do not know about the aluminum version, but I suppose it will hold up quite well, after all it must have been designed with awareness of the OMC V8, but it is not as strong as the stainless steel version.

I do not know who can mount nose cones in the UK. It seems to me that you have 2 options:

1. Buy a Bob's cone from the US. It comes with installation instructions. Find someone who knows what they are doing to do the welding and do the epoxy work yourself.

2. Send the gearcase to Tooter in the US. He has a better reputation than Bob's for installing cones. I have a link on my links page.

[300x Stoker]

Originally posted by Markus


However, adding a nosecone to the Torquemaster will be a lot cheaper than buying another Sportmaster and can potentially give even better performance.

.

I've been trying to figure that one out. One guy told me if you put a cone on a torquemaster the 300X would over heat once you really cobbed it too her, because you end up only using the water intake on the bullet and loose the side inlets????

For sure you need a cone or Sportmaster because that boat will be so fast with that 300X you might hurt yourself if you don't have one.

The sportmasters are nice because you don't have to touch up and re paint the thing every year. I'd think you might want the 1.62 gears so you could run a smaller pitch prop.

Don't be surprised if you notice a huge speed increase. I recommend a helmet and safety gear ??:eek:

I would like more info on the cone on a 300X Torquemaster.

The 300X Sportmaster case makes the stern of our Stoker ride higher in the water, which offsets some of the extra weight of the engine. It also makes the boat bounce around more on waves or chop. A over hub prop will let the tail ride a little lower for a smoother ride.

We were thinking about trying a Touquemaster with cone to see how that would make the boat handle.

If you don't have someone who can install a cone where you live. I would go with the Sportmaster and hang on tight.
:D

Question!

Is the 300X case bigger than the 2.5?? One guy told me the skeg was bigger on the 300 and if you had a small boat you could cut
down the skeg to the 2.5 profile without killing yourself. Especially if you weren't always running it full surfacing????

Please excuse my ignorance on at least part of this. :cool:

We went from the smaller motors to the MONSTER too and the two cases you have to choose from each have their own performance characteristics. If you carry passengers who are ample of body :D You could be better off with the coned Torquemaster if the GURUS assure us the over heating scare is Hog Wash?? :confused: :confused:

Don't forget the big fuel line and fittings. :rolleyes: