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Old 10-06-18, 09:59 PM   #611
wolseley phill
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A bit of load will most certainly help. There was no spring in this one, so I put a fairly soft spring in the pushrod just as a starting point - I'll swap it for the original engines spring, the jet from that engine has also been fitted.

The reason for the lean running became apparent when the carburetor was removed and I could see that the gasket had been leaking. I'll have to lap the carburetor flange flat again but that's quite straightforward.

Otherwise, I'm pleased to report that there was nothing nasty to be found and having cleaned up any oil, the crankcase and cylinder have now had another coat of primer.

Untitled by Phillip Sheppard, on Flickr

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Old 10-06-18, 11:28 PM   #612
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The spring that was in my P5, which governed to an accurate and steady 1500RPM is quite stout. About 2 Ĺ" long, .060" gauge wire and around 20 turns.

Neil.
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Old 12-06-18, 09:05 PM   #613
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Thanks Neil, having retrieved the other spring now, it fits that description. I'll put it back together with that one.

Just need to let the paint harden off, tidy up a few errant blobs of paint.. and it can go back together:

Untitled by Phillip Sheppard, on Flickr

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Old 12-06-18, 10:48 PM   #614
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If you need accurate dimensions Phill I can measure it easily as it’s in my tool box.

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Old 16-06-18, 11:24 PM   #615
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With all the major work behind, the P4 has gone together quickly. I spent some time looking at ways to seal the magneto and having failed with cork, rubber and felt; I went with using silicone sealant. That seems to be the only way to get a reasonable clearance for the chain and sprocket too.

So that the magnetos position can be more easily adjusted, I made these bolts which have a clearance in the mag pedestal slots, it was otherwise very difficult to get it right and I didn't want to take a file to the engine at this stage. They may look skinny but are plenty strong enough for the job.

Untitled by Phillip Sheppard, on Flickr

Untitled by Phillip Sheppard, on Flickr

Always double check the timing marks are correct!

Untitled by Phillip Sheppard, on Flickr

Untitled by Phillip Sheppard, on Flickr

Untitled by Phillip Sheppard, on Flickr

It was quite a struggle getting the coupling pins into the rubber bushes but it went in the end. Everything turns nicely and I'm looking forward to another test run, hopefully getting some volts from the dynamo. That's not likely to happen for a few weeks though and it's unlikely to be ready in time for Ducklington.

Untitled by Phillip Sheppard, on Flickr

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Old 16-06-18, 11:34 PM   #616
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Quote:
Originally Posted by wolseley phill View Post




Always double check the timing marks are correct!

Untitled by Phillip Sheppard, on Flickr



Phill.
Phill, are you saying the factory marks were that far out
That looks like a little over Ĺ" out ?
What are you setting the point to open at, think mine is 1 ĺ" BTDC
Well it is if the marks are correct

Looks like I have a job to do once I'm back on my feet, or rather once I have a chance of getting up off my knee's which is where I'll be to check

Neil.
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Old 16-06-18, 11:56 PM   #617
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Well itís the flywheel from the other engine, the key ways are cut differently. I just found TDC and measured back the same as the distance between the two original marks. Chances are yours is fine but I learnt the hard way to just do a visual check on TDC marks.

What have you been up to now then!?

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Old 17-06-18, 12:33 PM   #618
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Quote:
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What have you been up to now then!?

Phill.
Hernia repair of an older repair

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Old 17-06-18, 12:35 PM   #619
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Quote:
Originally Posted by wolseley phill View Post
...That's not likely to happen for a few weeks though and it's unlikely to be ready in time for Ducklington...

Phill.
That looks lovely Phil, and I can't see any reason why you can't be ready for Ducklington.

Mind you - you might want to bring something quiet; it can be hard work spending all day sitting next to a noisy engine when you've got a hangover...!

MP
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Old 17-06-18, 12:42 PM   #620
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Thanks Martin, Iíll have a good go but the next few weeks donít leave much time for engines!

I have a marine silencer so it should be ok..

Phill.
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