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Posted

I have had problems with my 2b ever since I bought it roughly 6 weeks.  I thought the engine had a lot of compression and the starter was finding it hard to turn over.

Today I replaced the starter motor and no change. I replaced the battery and no change.

locked at the connections all look ok.  Cleaned all earth terminals. No change.

voltage is 12.8 volts and turning over is 11.3 volts.

turning over is very slow / hardly turning??????

Posted
1 minute ago, tractor said:

i would come and help you but you are a long way away 

what are the cranking amps and ah on your battery 

Cranking amps not sure. It’s a 0.9kw starter motor and a 60 ah battery 

Posted

Do the main power lead to the starter and the engine earth lead look up to the job i.e. like something you'd see on a production car? Does the power lead get hot when cranking?

Posted

Do you have any reason to suspect that the compression ratio has been raised? Can you double up the power lead to starter so you can be certain it's capable of passing enough current?

Posted

No reason to think the compression has changed.  It was just it would always start but very slow cranking.

thought to change the starter motor.

i can double up the starter cable if you think that’s worth a try

Posted

If doubling the cable dont forget to double the earth back from the starter to the battery. A pair of jump leads?

Talking of jump leads have you tried connecting a second battery in parallel?

Slow cranking can also be a sign of over advanced ignition.

Posted
10 hours ago, IanS said:

If doubling the cable dont forget to double the earth back from the starter to the battery. A pair of jump leads?

Talking of jump leads have you tried connecting a second battery in parallel?

Slow cranking can also be a sign of over advanced ignition.

I have put jumper cables from my wife's car with it running and its the same.

Posted
11 hours ago, IanS said:

Slow cranking can also be a sign of over advanced ignition.

It's worth considering the point that Ian is making here. I experienced this with a 1380 tuned Mini (many) years ago. Try retarding the ignition timing or, alternatively, crank with the ignition electrically disconnected. If the engine turns freely with no ignition, you'll know it's ignition timing causing the issue.

Posted

Have you got any jump leads? Use these to add extra grounds between engine and chassis and / or gear box and chassis.  Quick way to tell if you need to improve the grounding.

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