Originally Posted by
BrightGarden
This thread hasn't seen updates in over two years but if anyone is listening, I am looking for some help with a D7, new-to-me, that I simply cannot get started. I haven't performed any disassembly yet but i figure there is nothing more I can do on the exterior of the engine.
The venturi seems really wide to me, but I didn't question it. There was mention above of venturis being so big they don't create enough suction - that got my attention.
Next stop is checking out the NVA which seems to work just fine but I won't know unless I check it out.
Assuming that you don't have a through venturi NVA.
Then the venturi hole for c/l stunt type uses should be about 3.2mm or 1/8" plus or minus a tad.
A Cox TD 049/051 banjo/venturi works just fine in most .15 size diesels.
A good way to test the hole size is to insert the twist drill that just fits.