Forty series is this a Wipac 2 fault?

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african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 7:45 am

I have a spare Wipac coil and points here, so I can see and understand how they would be fitted.

Can these units be bench tested?


I put a circuit tester on audio and checked between the brown wire to the points and the brass nipple that the HT lead connects to, I got no indication of a circuit, I assume the coil is at fault?

Possibly not as the working one on my Seagull 40 reads zero as well.

This Wipac coil is marked M2, the one on the engine that I am working on is marked M3 ( in vertical bars) another I have is not marked, does this date them?
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african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 7:48 am

tambikeboy wrote:A brave man would stick 2 fingers in the flywheel recess and take the weight of motor in one hand whilst whacking with the other remember the further that it's of the ground the further it's conna fall...

Thanks, it can only fall as far as the dome nut will allow?

I would hang it close to the floor which has a carpet on it .

tambikeboy
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Re: Forty series is this a Wipac 2 fault?

Post by tambikeboy » Sat Jan 19, 2019 7:56 am

Thanks, it can only fall as far as the dome nut will allow?

I was being funny if you use the brave man method and whack your hand instead of the crank shaft then it's conna fall right to the floor . Bashed tank snapped tiller and probably tank lugs and a few old time Scottish words thats why I prefer to go a long way for a short cut..... :lol:
Roll me up and smoke me when I die
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african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 8:42 am

The one man rope trick works and I can recomend that method, you have a lot of control for sure.
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african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 8:43 am

The one pound copper faced hammer was a good weight for this job, it still took a few good whacks though, the nice rechromed dome nut is trashed though.
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african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 8:45 am

Before the one pound copper faced hammer and after.
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african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 8:47 am

The masking tape was there so that I could mark the shafts relation to the key way in the flywheel.

The missing key was in fact there, just a lot lower down the center shaft that I expected.
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african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 8:51 am

With the so called missing key still being there the timing will not have been wrong.

I am now into new ground for myself.

I note that an audio test meter between the points and Wipac coil terminal produces no sound, is the coil some sort of solid state electronic system that does not test as a wound coil would ?

Next I can remove the Wipac unit and clean it and the base plate that it fixes down to, when the flywheel has been repainted and fitted I can re set the points, they are at 0.5mm anyway, what else can I do?

It seems I have found nothing wrong yet?

The original base plate had a section on the rear edge on the boats transom side, so I have removed that and fitted a spare one that is undamaged.
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Charles uk
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Re: Forty series is this a Wipac 2 fault?

Post by Charles uk » Sat Jan 19, 2019 10:45 am

The rope hanging trick is not recommended by anyone as it can be hazardous to flywheel health.

You work it out, if the flywheel doesn't release where does all the impact force go?

Bearing in mind this flywheel is made from a brittle high zinc alloy.

Better check yours for cracks around the windows!


Anyone got a picture of a broken flywheel center still on the crankshaft?
Make it idiot proof and someone will make a better idiot.

african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 11:31 am

Charles uk wrote:The rope hanging trick is not recommended by anyone as it can be hazardous to flywheel health.

You work it out, if the flywheel doesn't release where does all the impact force go?

Bearing in mind this flywheel is made from a brittle high zinc alloy.

Better check yours for cracks around the windows!


Anyone got a picture of a broken flywheel center still on the crankshaft?

Charles, thanks on your advice.


I bead blasted the flywheel inside and out, then sprayed it all over with an etch primer to accept the top coat, if any cracks had happened I would have seen them.

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Hugz
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Re: Forty series is this a Wipac 2 fault?

Post by Hugz » Sat Jan 19, 2019 1:28 pm

I'm a bit rusty here and not up on wipac but you would be looking at 2 readings here. A close to dead short on the primary winding which is the wire going to the points and earth/ground and the secondary winding which has a lot of fine coils (20 thousand) which is measured from the HT lead contact and ground/earth. As both coils have a common earth you should get a resistance reading from HT contact and wire to points. I think you would be better served by using an analogue or a digital meter.

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Charles uk
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Re: Forty series is this a Wipac 2 fault?

Post by Charles uk » Sat Jan 19, 2019 1:42 pm

There's some other components inside the coil case (condenser/resisters) I'm told Hugo, that confuse the issue.
Make it idiot proof and someone will make a better idiot.

african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 3:04 pm

Hugz wrote:I'm a bit rusty here and not up on wipac but you would be looking at 2 readings here. A close to dead short on the primary winding which is the wire going to the points and earth/ground and the secondary winding which has a lot of fine coils (20 thousand) which is measured from the HT lead contact and ground/earth. As both coils have a common earth you should get a resistance reading from HT contact and wire to points. I think you would be better served by using an analogue or a digital meter.

John at SOS has just advised what the readings should be and where to test for them?

Right now we are all back together, new base plate and a paint job on the flywheel.

Same result mind you, as the engine will still not fire!

Test a coil by simply measuring between the HT outlet and earth, should be
3500 to 4500 Ohms.

I have just tested with my digital meter and I read 5.0 ohm is this too high?

The spare one I have reads to 4.5 ohm which is on the high end of Johns indication.


On the newest motor I have the reading is 3.9 ohm.
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african imp
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Re: Forty series is this a Wipac 2 fault?

Post by african imp » Sat Jan 19, 2019 3:05 pm

Ready to run, if only it would.
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tambikeboy
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Re: Forty series is this a Wipac 2 fault?

Post by tambikeboy » Sat Jan 19, 2019 5:05 pm

african imp wrote:Ready to run, if only it would.

So you now have

Spark
Compression
Fuel
I'm guessing. :cry:
Roll me up and smoke me when I die
Regret is just a memory written on my brow

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