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AMC engined Plover - Wont start

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AMC engined Plover - Wont start

Post  Davidohyeah on Mon Sep 18, 2017 8:23 am

Gents,
Having a spot of bother getting a AMC enginned Plover to start.
To date we have a reasonable spark.
New Plug, Points, condencer, repaired keyway. Highest octane petrol 30:1 ratio

Now one observation is I cannot adjust the timing to achieve BTDC firing, because the stator will only advance to TDC and no further.

With a hot plug (warmed with gas torch) I get a cough and fart, and that's about it.
AMny adivce would be grately recieved.
Regards
David

Davidohyeah

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Join date : 2017-04-06

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Plover starting

Post  Kevin B Smith on Thu Sep 21, 2017 4:45 pm

Hi,

I take it the engine is the AMC 15T?

If so the timing is set by the key on the crankshaft - so that should be right - you cannot be far out.

It could be you have an air leak? If the engine has stood for a while it could be the crankshaft seals have dried and you are pulling air into the crankcase = weak mixture = difficult or impossible to start!

if you try squirting some petrol/oil mixture direct into the cylinder, via the plug hole, put the plug in and it stats/ fires and then stops this points to a lack of fuel getting to the cylinder.

Seals are easy to replace and available.

Easy check to do.

Kind regards.

kevin Smith

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15T starting

Post  FB vincent on Sun Sep 24, 2017 7:36 am

You say that you 'have a reasonable spark'.

From my frustrating experience of 2 stroke engine magnetos, a spark may be present when tested with the plug out of the cylinder, but may still not be adequate to start or run the engine. Sadly I cannot advise you how to test the coil, but perhaps others can.

Replacing the HT lead and checking the plug cap should also be considered.

The 15T Plover instruction manual does have a section titled ' Ignition Failure' .

Sandy Ross


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Francis Barnette Runner!

Post  Davidohyeah on Mon Sep 25, 2017 7:40 am

Dear Both,
Thankyou for your assistance with my FB plover.
The problem in the end was the 'points opening cam' on the flywheel was simply too far retarded
to allow for correct setting of the ignition timing.
I purchased a used flywheel from Villiers spares, the opening cam in a much more advanced position, timed up 3/32 before TDC
(with the small amount of adjustment availalble) and away she went!

Now I have another small issue.
The pimary chain is very slack, but not slack enough to take an link out, any ideas?

many thanks

Kind regards

David

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Re: AMC engined Plover - Wont start

Post  FrankG on Mon Sep 25, 2017 9:33 pm

Hi, Someone may correct me but I think you have to put shims/extra gaskets between the engine and gearbox to take up the slack.

Frank

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Re: AMC engined Plover - Wont start

Post  Davidohyeah on Tue Sep 26, 2017 7:18 am

Hi Frank,
thanks for this
regards
David

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gearbox shims

Post  piston 197 on Tue Sep 26, 2017 1:54 pm

No shims on the gearbox on AMC 15T, gearbox just bolts to back of engine cases, with no adjustment, New chain required I am afraid  !
JH
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Re: AMC engined Plover - Wont start

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