Merc 1000 X

[Selvaracer]

any other photos of that motor? Would be interested to see where they moved the switch box and rectifier to. Whats the brown wire heading into the carbs do?

Sorry,no other photos.I may ask the owner,the engine is(was) for sale in Italy.The brown(yellow) wire goes to distributor as in T2 or T2X.The switch box and rectifier are in original places as seen in the left picture.Thats my engine,when it was "young" and virgin.

[Mark75H]

Expansion chambers do not produce much power increase unless the exhaust open time is 180+ degrees ... most pleasure based outboards have exhaust open timing around 160 degrees.

Increasing the exhaust open timing to 180 degrees decreases lower rpm power to the point that the motors can not get the boat over plane.

Motorcycles avoid the low rpm issue with 5, 6 and 7 speed transmissions ... snowmobiles use infinitely variable V belt clutches, jetskis just rev without pushing the vehicle

[Mark75H]

I have a 68 1000 SS that I'd like to add some performance parts to but I can't find much in the way of info on what parts might available.

There is nothing practical that can be done to add performance, if you don't have enough power, you need to find a bigger motor.

[Powerabout]

Is that the engine to use to race in a 1250cc class?

[Mark75H]

Not in the US

[Popa Sam]

If you go to the "Outboard History" section and the "NOA thread" there is a video of a motor running on a tunnel boat that is very similar to this one. A description of how it was built is also in the thread.

Clickhttp://www.boatracingfacts.com/forum...ead.php?t=9490, then scroll down to post #8