ISTR the pump has a very thick gasket (about 5mm) could this be the reason for 
the difference? Did your old one just have a thin gasket, and therefore when 
the 'correct paired parts' are used it is ok? Is there possibly a (maybe 
partial) blockage? With the pipes disconnected from the tank and the 
underbonnet area, it may be worth using an airline or high-pressure bike pump 
to blow them through just to make sure.
Martin
  ----- Original Message ----- 
  From: teegee777 
  To: quantumowners@googlegroups.com 
  Sent: Thursday, September 05, 2013 9:56 PM
  Subject: [Quantum Owners] 2+2 1.4 CVH mechanical fuel pump


  I'm having problems starting the 2+2, it has a 1.4 cvh engine with twin choke 
Weber and mechanical fuel pump. It always was a little difficult to start after 
a period of non use (6-7 days) but pumping the accelerator always got it going. 
The other week it refused to start and had been smelling of petrol, there was 
no fuel in the in-line clear fuel filter. I got it started by putting a fuel 
hose in a petrol can and after it started I found a leak in the return pipe 
from carb back to the tank, fixed this and everything had been fine. However it 
has now started to play up again, same symptoms, so ordered a new mechanical 
fuel pump. Now I have two issues.... The operating stud is about 4-5mm longer 
than the original fuel pump and it still isn't pumping up from the tank. Any 
ideas on packing /spaces for the new pump and what may be the problem at the 
tank end? I guess I may have to lay on the floor and have a look :o) Doesn't 
appear to be smelling of fuel anymore. If I prime it from the petrol can it 
will work (for ever),guess the engine running is better than pumping on the 
starter motor. Thanks Tony


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entity with respect to liability, loss, or damage caused or alleged to be 
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