Good advice. Use WD40 if you feel you "have to use a starting fluid". Never use ether.

Is your primer pump the older style (white one)? If so, be sure the o-ring is seating properly against the pump body.

You can reverse the supply and return lines to clear the screen in a pinch. Or just blow compressed air through the supply line in a burst.

When was the last time you replaced the fuel filters? The primary should be changed every oil change and the secondary can go about 3 times as long if you do not have any biological fuel related problems.

__________________
AJ

1985 300D (SOLD)