I thought about the presence of old washers when I took them apart last
night and did not see any. I watched your video the previous night and
thought that was the problem, that is why I took them apart last night and
found the washer compressed into the hole (once removed the gas came rushing
out). I meant to take compressed air to it but was running out of time.
When reassembling I backed the washer a good quarter of an inch and tried my
best to keep the jet tube bottomed out in the bowl while tighting. That's
when I felt like they were a bit short.
This morning I received a reply from an individual that mentioned there are
better replacement jets available from Burlen Fuel Systems (tubes are
longer). Have you or anyone else out there had experience with these? Who
stocks them?
I am going to give it another try today with a fully charged battery. If
that does not work I'll take the carbs off, shoot air into the bowls,
assemble again and give it a go.
Looking forward to your opinions.
Dereck
70 B
----Original Message Follows----
From: "Lawrie Alexander" <Lawrie@britcars.com>
To: "Dereck C" <derex39@hotmail.com>
CC: <mgs@autox.team.net>
Subject: Re: 70 MGB no start after complete rebuild UPDATE
Date: Thu, 17 Aug 2000 08:13:05 -0700
Dereck.......
Lack of oil in the dashpots will not prevent the car from starting but will
result in a momentary lean condition when you open the throttle.
Make sure there are no old rubber washers in the bases of the float bowls. I
have often found new jets jammed in on top of old ones. You should be able
to see aluminum in the hole where the jet tube threads in. Then you push the
new rubber washer back a quarter inch or so along the new jet tube and
carefully aim the tube into the center of the hole in the float bowl, before
starting to thread the nut into the hole. This will ensure that the tube is
not blocked by the new seal.
Lawrie
British Sportscar Center
-----Original Message-----
From: Dereck C <derex39@hotmail.com>
To: Lawrie@britcars.com <Lawrie@britcars.com>
Cc: mgs@autox.team.net <mgs@autox.team.net>
Date: Thursday, August 17, 2000 5:21 AM
Subject: 70 MGB no start after complete rebuild UPDATE
>I got a little further last night before the sun went down and I could no
>longer see. I retimed to TDC and the rotor pointed directly at number one
>piston. I timed it so the points where just opening (counter clockwise)
and
>attached the wires in the 1-3-4-2 arrangement. Cranked it and nothing
>changed. Then I cranked it with a bit of starter fluid - vroom for about
2
>seconds. So I deduced that there was a fuel starvation problem, which I
>already thought was a problem because I never really smelled gas on the
>plugs or in the carbs. So I took the twin SU HS4's off and checked out
the
>jet to float bowl connection. Seems that the rubber washer was
interfering
>with the flow, it was crushed into the float bowl. It seems to me that
the
>jet fuel-lines are a bit short (same size as the old ones). Then I
>reinstalled the carbs after carefully insuring that the rubber washers did
>not get crushed into the float bowl (still not sure that it worked). I
>attempted to start the car, no go. Then with starter fluid - vroom for 2
>seconds. By this time it was too dark outside and I had to close up shop.
>To things that I believe did not help the final attempt was that the
battery
>was getting very weak (trickle charged last night) and I forgot to top up
>the dashpots. Will lack of oil in the dashpots result in fuel starvation?
>How do you keep from crushing the carb-jet-to-float-bowl washer?
>
>Dereck
>70 B
>
>
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