Just fitting my engine and even with a modified sump, the group clearance is still tight - looks around 60mm ? If I raise the engine, obviously this will knock the prop-shaft off being horizontal.

Is there any reason I can't do this? What prompted me to try this was seeing a flatbed truck go by, and the prop-shaft was about 10 or 15deg from horizontal. I only want to raise the engine about 10 or 15mm so angle will be minimal ?

As long as prop mounting faces remain paralell then the angle will not be a problem.

Ideally the propshaft should have about 3 degrees angle at each joint - it doesn't matter which way the angle is.

rgds,

David

But as Spiderman says, the mounting flanges should be parallel

Mick

Sorry - you are quite correct - I left that bit out.

What I was trying to say was, the propshaft mustn't be dead straight as it causes wear. Both ends must be parallel but offset a bit, giving an angle of around 3 degrees at each joint. There probably is an upper limit, but I don't know what that is.

rgds,

David

The slight angle of the prop. (3 degree or so) ensures the rollers in the UJ move around and do not work in just one position.

The further out of line you go the more the power loss and the shorter the life.

As already mentioned getting the input and output parellel is important. UJ`s are not constant velocity joints so the equal angles cancel out the variations of velocity.

JB