If the blades foul the upper or lower edges of the screen,you can fix it in the following ways:
1. Cut down the blades a little, but really you do not gain much.
2. Get telescopic wiper arms from CarBuilderSolutions, shorten them so much that the blade doesn't foul the upper edge of the screen.
3. If the blade now fouls the lower edge, you must lessen the sweep angle by changing the wiper motor gear, also available from CBS among others.
By combining 2 and 3 I managed to fit CBS 8" blades. I had to change from 135 to 105 degree sweep angle, though. Could have used 110, perhaps even 115.
Thanks Robbie for your very helpful advice.. As it’s a lower edge problem, it appears that a change of motor gear is the only effective solution as with these new blades, it is not possible to shorten that end without compromising the integrity of the blade.
I see motor gears are £21.60 so will check my existing one first and go from there.
Edit: Having now removed the cover from the wiper mechanism, there is no angle stamped. Trying to measure the angle traversed by the actual blades is hit and miss as there is some slop in the mechanism. The best I could do seemed like 150 degrees but that seems too large. So, rather than waste more money on putting right what should have been done right in the first place...I will put up with it, in the Morgan style to which many owners are sadly accustomed to!
