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We had this happen in about 1965 on a 1500S; it partially filled up a cylinder when parked nose up on a steep slope with full tank. Fortunately my father didn't try bump-starting when the starter couldn't turn the engine over, but dropped it back out of the drive onto level road. After standing a while, it started no trouble. The service manager later showed him a bent con-rod caused when someone else had tried bump-starting in this situation. The twin carbs up to July 64 don't appear to have the cut-off valve. I understood they brought in the idle cut-off valve after that to stop it, but maybe the special fuel valve (listed for all 1500S twin carb engines) was a quick solution. Interesting. The PHN32 single carb appears to have the idle cut-off valve from the start; it's in the carb top, suggesting it cuts the fuel off. Dave. UK VW Type 3&4 Club www.hallvw.clara.net/ ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org