Cleaned and stripped the distributor on my 1700cc Type 4 and the Vacuum advance unit isn't working at all. The distributor is a VW part number 113 905 205 AN also marked JPU 4, Bosch. I've looked at a couple of sites and they list 2 types of Vacuum advance, but both for 1,200 - 1,600cc engines. Anyone know where to source the correct item?
You want one of these... only difference in the dizzy is the weighting to adjust the advance curve http://www.vwheritage.com/vw_spares...70501_lang_EN_country_GB.htm?crumbStartPage=1
And the fitting holes - there are 2 on the new one, top and bottom of the tabs and one on the existing, bang in the middle. Careful drilling needed.