Spitting through HS4 carb

Technical MGB discussion
Ian Fozzard
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Joined: Fri Mar 27, 2015 8:18 am
Forename: Ian
Surname: Fozzard

Re: Spitting through HS4 carb

Post by Ian Fozzard » Tue Jun 23, 2020 5:22 pm

Too far for me I'm afraid, but would have loved to have had a look!

Ian F
1972 BGT, Blaze, Navy trim, recessed grill
1961 Midget, 948cc, Clipper Blue, Blue trim and weather gear

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Steven collins
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Joined: Fri Oct 31, 2014 5:20 am
Forename: Steve
Surname: Collins

Re: Spitting through HS4 carb

Post by Steven collins » Tue Jun 23, 2020 5:29 pm

No worries thanks for the thought though.
I bought a new rotor arm and cap through MGOC they did ask what year did I purchase it as the newer ones (programmable 123) are different.

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Steven collins
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Re: Spitting through HS4 carb

Post by Steven collins » Mon Jun 29, 2020 10:29 pm

Right, here goes update 1

checked 123 dizzy - NEW cap, pin inside jammed permanently up - not spotted when fitted 🙄 so cap U/S
Timing slightly out requires tweaking, however, 123 locked in solid pry bar would not shift it so even bigger pry bar initiated 😡
Air leaking around rear carb manifold 🤬
NEW spark plug leads - no 3 arcing on heater valve 🤯

123 dizzy replaced with 45 dizzy and re- timed, just as well I had a perfectly good one in the garage spares box🙂
Replaced NEW faulty leads with original working leads - now no arcing 😃
On order- manifold and carb gaskets😑
Hopefully when everything has been fitted and balanced it should run as it used to - well hopefully better- watch this space....

Ian Fozzard
Posts: 391
Joined: Fri Mar 27, 2015 8:18 am
Forename: Ian
Surname: Fozzard

Re: Spitting through HS4 carb

Post by Ian Fozzard » Tue Jun 30, 2020 8:27 am

Hi Steven, thanks for posting back - most folk don't seem to bother, but posting back is what makes a forum valuable😊😊.

Sounds like excellent progress, fingers crossed it leads to a good conclusion! Multiple small problems can be extremely tricky to solve and lead to lots of false trails.

Ian F
1972 BGT, Blaze, Navy trim, recessed grill
1961 Midget, 948cc, Clipper Blue, Blue trim and weather gear

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Steven collins
Posts: 41
Joined: Fri Oct 31, 2014 5:20 am
Forename: Steve
Surname: Collins

Re: Spitting through HS4 carb

Post by Steven collins » Tue Jun 30, 2020 8:47 am

No problem Ian, sometimes by posting solutions to your own difficulties it can help others.
Just frustrating that when you purchase new items they turn out to be faulty,

aide - memoir
Check and recheck all new parts before fitting!!

Will update again when new parts arrive and fitted.

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