OK, so long as your vapour locks are downstream of the primer bulb.
The problem is that vapour locks are best cleared by blowing them through,
rather than trying to suck them through. Sucking may just compound the
problem.
Many of the constrictions in a Europa system (eg tank outlets, filters and
cock) are on the upstream side.
What head of fuel will your primer bulb pull against? By way of comparison,
a roller cell pump is not recommended for more than 2` on its suction-side,
although in reality can pull more.
Duncan McFadyean
-----Original Message-----
From: Nigel Charles <72016.3721@compuserve.com>
Date: Sunday, August 27, 2000 8:02 AM
Subject: Re: Flying: Engine reliability
>Message text written by Graham Singleton
>>the Facet isn't too good at pumping vapour either. The
>slightest air leak on the suction side, (possibly it will not show a fuel
>leak under gravity either,)will have a similar effect on fuel pressure at
>the engine and with low fuel levels prevent full power being developed.
><
>
>Mindful of the difficulty of clearing airlocks I have inserted a primer
>bulb inside the centre tunnel. I also have fuel temperature and pressure
>indications at a point just before the carburetters which should help
>diagnose any problems.
>
>Nigel Charles
>
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