No spark

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Charles uk
Posts: 4824
Joined: Wed Feb 27, 2008 4:38 pm
Location: Maidenhead Berks UK

Re: No spark

Post by Charles uk »

According to Seagull's figures the cranking speed of a recoil equipped Seagull is between 650 & 800 revs when hand cranked, a little slower than a non recoil motor, most power drills are not much faster than that.
Make it idiot proof and someone will make a better idiot.
malhiggins
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Joined: Fri Mar 06, 2015 1:59 pm
Location: Galway

Re: No spark

Post by malhiggins »

There is a yellow spark from the plug. What is the carburettor like to dismantle as they appear a solid unit.

Malachy
phil
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Location: nova scotia, canada

Re: No spark

Post by phil »

Yellow not good enough look for a blue spark that will jump at least 10mm. Necessary because the cylinder is under compression when spark occurs, making sparking more difficult in the cylinder. Clean the points better and check your plug lead for resistance zero or very close will likely do.
Take the points out and clean where they contact the stator plate. Lightly sand with 320 or finer grit auto body shop type paper, clean with alcohol, acetone or similar.

Carb quite easy, give it a go.
malhiggins
Posts: 11
Joined: Fri Mar 06, 2015 1:59 pm
Location: Galway

Re: No spark

Post by malhiggins »

Morning all.

In the past I cleaned the points, as best I could, through a small opening in the flywheel cover but in order to achieve a better cleaning process I must remove the flywheel cover. Is this difficult to do and are any special tools required? I'm still waiting on the arrival of a new sparkplug from England to Ireland.

Malachy
haventaclue
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Location: Donegal

Re: No spark

Post by haventaclue »

If there are any vintage tractor owners or even dealers,Massey or John Deere,near you they might have plugs.I got mine from the JD dealer
phil
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Re: No spark

Post by phil »

The cover is easy to get off, just undo the top nut and lift the rope pulley off, then the cover, if the cover is a bit stuck because of some junk stuck in the flywheel groove, try bouncing it with light tapping a 1/2" back from the circumference all
the way around. Or very carefully pry up edge with something sharp carefully to avoid marking.
malhiggins
Posts: 11
Joined: Fri Mar 06, 2015 1:59 pm
Location: Galway

Re: No spark

Post by malhiggins »

Morning all.

I will have to leave taking off this cover until the weekend as I'm currently working away from home. Is the nut that holds on the cover a right or left handed thread? If the plug only produces a yellow spark does that mean there may be something wrong with the coil?

Regards

Malachy
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Charles uk
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Re: No spark

Post by Charles uk »

Clean & set the points twice, with fine wet & dry, folded so it cleans both sides at the same time!
Make it idiot proof and someone will make a better idiot.
malhiggins
Posts: 11
Joined: Fri Mar 06, 2015 1:59 pm
Location: Galway

Re: No spark

Post by malhiggins »

Morning all.

Over the weekend I tried unsuccessfully to pry off the outer casing that holds the points and coil, please see a hazy photograph. Do I require bearings extractor to complete this task.

Regards

Malachy
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haventaclue
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Location: Donegal

Re: No spark

Post by haventaclue »

Set piston as down as far possible,put dome nut on,get help to lift engine by flywheel,if no help available,I lift engine with two fingers in the opening,strike dome nut sharply with rubber mallet,if doing it yourself,refrain from striking your second finger as it is rather painful.DO NOT use a bearing puller.
malhiggins
Posts: 11
Joined: Fri Mar 06, 2015 1:59 pm
Location: Galway

Re: No spark

Post by malhiggins »

Morning all.

Thanks for the advice which I have tried doing with the assistance of a fellow worker but without success. Despite several hammerings, with a rubber hammer, it does not seem to want to move. Will try again later.

Malachy
malhiggins
Posts: 11
Joined: Fri Mar 06, 2015 1:59 pm
Location: Galway

Re: No spark

Post by malhiggins »

Does anyone know to dismantle a carburettor on model FPC1723AAP (Forty). When I remove the screw A as shown on the Seagull Carb webpage the float chamber just turns without coming loose.

Malachy
Keith.P
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Re: No spark

Post by Keith.P »

I don't know what screw you have removed, if its the one on the side of the carb body, that one is holding the main jet in place, if so replace the screw, but it will have to line it up with the slot again, by turning the bottom nut.
Side screw in the picture.
Villiers carb.8a.jpg
Yes playing 3D pictures again.
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AusAnzani
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Re: No spark

Post by AusAnzani »

Not sure if it's been already covered but the reason the drill sometimes works to clear points and get a spark, is because with each closure of the points there is a wiping action on the surfaces.

It is this wiping action that keeps the points surfaces clean under normal operation. The same principle applies to relay contacts and contactors designed to switch larger currents.

Best option though it to clean manually as suggested by others here already. 1000 grit wet and dry paper folded and pulled through closed points contacts is usually enough to do the trick. When the points contacts change from black to silver or gold etc, you know you're ready to go.

Regards,
www.vintageoutboardsaustralia.blogspot.com
malhiggins
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Location: Galway

Re: No spark

Post by malhiggins »

How do you dismantle the plastic carb so I can clean it? I have loosed the screw in the picture shown but all that does is to allow the float chamber to turn but it does not come off.

Malachy
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