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by AJL Electronics
Sun Jan 26, 2020 8:34 pm
Forum: General Technical Discussion
Topic: Understanding my automatic choke
Replies: 28
Views: 617

Understanding my automatic choke

Reading between the lines, it seems that the electric pump was fitted to mask the hot starting problem. As Phil says, the fuel pressure needs to be measured. Either that or revert to the factory pump. Then start from the basics again. Has the points gap been checked? Has the timing been checked? Has...
by AJL Electronics
Sun Jan 26, 2020 11:29 am
Forum: General Technical Discussion
Topic: Understanding my automatic choke
Replies: 28
Views: 617

Understanding my automatic choke

Repair the fault, rather than changing spurious parts. The fault appears to be flooding. That is the certain result of using an electric pump unless correctly specified and regulated to 3PSI.
by AJL Electronics
Sun Jan 26, 2020 10:22 am
Forum: General Technical Discussion
Topic: Understanding my automatic choke
Replies: 28
Views: 617

Understanding my automatic choke

If you read his descriptions, he has been starting it with throttles wide open, which would clear flooding and allow it to run until the fuel pressure overcomes the needle valve again and it overfuels. I don't understand the fetish for changing a perfectly good original pump for one that will bring ...
by AJL Electronics
Sun Jan 26, 2020 10:00 am
Forum: General Technical Discussion
Topic: Understanding my automatic choke
Replies: 28
Views: 617

Understanding my automatic choke

There you go, the electric pump is very likely forcing the needle valve open. It doesn't take much and I have seen it even with a "carburettor" rated pump. Cheap regulators are no solution either. The floats just can't cope with the unexpected pressure. The pump does need an inertia switch, but it i...
by AJL Electronics
Sat Jan 25, 2020 12:28 pm
Forum: Project Progress
Topic: SS1 1800 CVH Project Now a diagram of the cooling system please
Replies: 61
Views: 2165

SS1 1800 CVH Project Is this a headlight?

That is definitely a P45t base. I have some nylon adapters in stock, however, they are pretty rubbishy. H4 bulbs with P45t bases are the ultimate answer.
by AJL Electronics
Sat Jan 25, 2020 9:03 am
Forum: General Technical Discussion
Topic: Understanding my automatic choke
Replies: 28
Views: 617

Understanding my automatic choke

It does sound like flooding, or ignition problems. Starting with the throttle held open, does it start and run? Could be carb needle sticking, or is there an electric fuel pump I wonder? Have the plug leads been taken off at all? Do you have a continuity tester so that we can check the static timing...
by AJL Electronics
Fri Jan 24, 2020 10:14 pm
Forum: General Technical Discussion
Topic: Understanding my automatic choke
Replies: 28
Views: 617

Understanding my automatic choke

Drop a tablespoon ish amount of neat fuel down each barrel. Then see if it tries to start. We can go from there.

You have got plenty of fuel on board I assume?
by AJL Electronics
Fri Jan 24, 2020 10:05 am
Forum: Se5/5a
Topic: Fuel tank sender
Replies: 41
Views: 958

Fuel tank sender

If you need to save money, the best way would be to build your own comparator. Fiver's worth of components at most. You can set your own trip level then and a two pin sender will be fine.
by AJL Electronics
Wed Jan 22, 2020 10:25 pm
Forum: General Technical Discussion
Topic: Understanding my automatic choke
Replies: 28
Views: 617

Understanding my automatic choke

Once the engine starts it will open the flaps slightly to admit air. As the cooling system warms up the flaps open under the influence of a bimetallic coil in the water chamber. If it drops out too soon or too late, there is an adjustment. Don't mess without good reason though, they work far better ...
by AJL Electronics
Tue Jan 21, 2020 7:42 pm
Forum: General Technical Discussion
Topic: Front hub bearing replacement
Replies: 17
Views: 839

Front hub bearing replacement

Grease packing should be no more than about half full. Otherwise it can end up in unwanted places when hot.
by AJL Electronics
Mon Jan 20, 2020 7:12 am
Forum: General Technical Discussion
Topic: Help, scimitar won’t turnover
Replies: 17
Views: 643

Help, scimitar won’t turnover

Find the fault, don't start changing things. If the choke is staying on (unlikely) you will see it. Run the engine on the drive with the air filter off from cold. Watch what happens when you press the throttle and pump,it. Watch what happens when it starts and as it warms up. You will be impressed! ...
by AJL Electronics
Sun Jan 19, 2020 10:28 am
Forum: General Technical Discussion
Topic: Help, scimitar won’t turnover
Replies: 17
Views: 643

Help, scimitar won’t turnover

You should put your location into your profile. Lots of willing and helpful members all over the country and even the continent.
by AJL Electronics
Sat Jan 18, 2020 10:33 pm
Forum: General Technical Discussion
Topic: Help, scimitar won’t turnover
Replies: 17
Views: 643

Help, scimitar won’t turnover

One of the typical cold start faults is due to perished and cracked fuel lines, specifically the ones from tank to nylons.
by AJL Electronics
Sat Jan 18, 2020 10:32 pm
Forum: General Technical Discussion
Topic: Help, scimitar won’t turnover
Replies: 17
Views: 643

Help, scimitar won’t turnover

Phil, That’s really good advice, the advice I was given was slightly different. I wonder would you know if I have my foot on the throttle and then turn her over is that a potential for flood. That’s what I was told to do. I’ll try your way in the morn. Thanks for that. Deano Keeping pressure on the...
by AJL Electronics
Sat Jan 18, 2020 10:29 pm
Forum: General Technical Discussion
Topic: Help, scimitar won’t turnover
Replies: 17
Views: 643

Help, scimitar won’t turnover

Don't let him mess with the carburettor, he should be finding the actual fault rather than doing irrelevant and backward modifications. For the engine to start it only needs fuel, air and a spark at around the right time. Simple basic work with no spotty yoof or laptop required.

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