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the design of the plenum could have a bearing on the 120 deg intake pulses , being that one carb would be drawn on evenly its the...

With a 4 inch drop in Pitch, it still won't go above 3000rpm. Even with a dead cylinder the revs would go up, with less pitch. I would...

The problem with the 2 carbs for 3 cylinders is that a 3 cylinder has 120 degrees between inhalations in the induction systems. With...

Thanks jimmbo . Guess it what one is used to seeing , all the motorbikes I recall had one carb per pot , and then I saw some 2 strokes...

set point gap, check with dwell meter, then set timing, then re-set idle speed about as simple as it gets old school tune up circa 1966...

The original factory t/t units for that vintage of OMC V4 are pretty hard to come by. While it was an available option, most V4 motors...

It was that way because of the Design of the Reeds, Mercury had on their Production Inlines. In 76, merc did make a 650XS which had the...

The 78 140 heads aren't too bad for compression, the tightest heads were on the 1973 135hp, but they are borderline on today's...

Wow! Someone actually read the rules! And it was a sock-puppet! Go figure! Now we have an enigma wrapped in a dilemma … we can’t ban...

Gonna have to moderate the moderator.

Ha ha I bet Joe has to " substantiate his identity " after posting that avatar then 😂😂

Yeah ,Im thinkin the 2 carbs for 3 cylinders is a bit of a patch job using what was laying around at the time ....and probly same thing...

Wow! Someone actually read the rules! And it was a sock-puppet! Go figure! Now we have an enigma wrapped in a dilemma … we can’t ban...

Gonna have to moderate the moderator.

Wow! Someone actually read the rules! And it was a sock-puppet! Go figure! Now we have an enigma wrapped in a dilemma … we can’t ban...