Yet another Petter A1 !!

Yeah, quite a few of these Petter A1's have de-compressor levers, but they're not really needed. Sidevalve engines never had much compression when new (hence why you never see sidevalve diesels). So long as it's wound backwards to compression before starting, that way, by the time you hit compression the flywheel should have enough inertia to get over. Also, with an impulse magneto the spark is retarded to TDC, they're never likely to kick back.

Hi All
I did take some pic's there stuck on me phone at the moment can't find them to get them off.
Any way made good progress last night a few more hour's should see it run hopefully
Cowling rubbing on flywheel now done. Cleaned the magneto, cleaned all air fins + bent petrol pipe to suit my carb.
What should the point's be set at. What's left to do is change the oil. make gasket for the carb. Get timing done, Put exhaust pipe. connect petrol pipe. Put petrol in swing and hope for the best
Andrew

SD card in my phone gave up so lost me pic's going to get camcorder of me mum that take's better still's+vid's then the phone

Hi All
Another Update.
Got the petter from ripon running and not good something is banging hard you can hear it over the exhaust
I have checked everything and seem's to be ok except the piston wobbling a bit could it be piston slap.
It happen's the same time as combustion. So i might be looking at a piston+rebore.
She start's easy enough though. I will try and get a video of it running so you can hear it
Andrew

Andrew1971 wrote:Hi All
Another Update.
Got the petter from ripon running and not good something is banging hard you can hear it over the exhaust
I have checked everything and seem's to be ok except the piston wobbling a bit could it be piston slap.
It happen's the same time as combustion. So i might be looking at a piston+rebore.
She start's easy enough though. I will try and get a video of it running so you can hear it
Andrew

yep get the video

Check the up & down fit of the rings in the grooves. My Scott PAB makes quite a mechanical noise when running, I thought it was the timing chain (actually, the timing chain is probably still responsible for some of it) but when I put another piston ring in, which was a poor fit in the groove, it made a right racket. Now I'm down from 3 to 2 rings, which is of little consequence as it's a 2 stroke.

You can usually tell if you rock the crank shaft back & forth. As the piston changes direction you will hear it. Like this it sounds a little like end play.

Sorry to hear it's got a problem at the minute but I'm sure you'll sort it without to much of a headache.

Andrew, are you bidding on any other engines on ebay ATM as there's a couple up for sale local that I might have a punt at if the price stays low.

Stu.

Hi Stu
I am not bidding on any more engine's at the moment or watching so you are safe from me
Because i am skint + need to sort out the one's i have first.
Best of luck hope you get what you want or need.
Andrew

Update
Finally i have a video of it running you can hear the noise more at a slower speed + it was taken in the shed

https://www.youtube.com/watch?v=GsGFP94R0Dg

I have taken of the extension shaft and put side case from the other petter on so i can do the timing if needed+easier to take of again

hmmm, have a listen to mine here this is the engine that was the last forum header pic before its tart up

Andrew1971 wrote:Hi Stu
I am not bidding on any more engine's at the moment or watching so you are safe from me
Because i am skint + need to sort out the one's i have first.
Best of luck hope you get what you want or need.
Andrew

Update
Finally i have a video of it running you can hear the noise more at a slower speed + it was taken in the shed

https://www.youtube.com/watch?v=GsGFP94R0Dg

I have taken of the extension shaft and put side case from the other petter on so i can do the timing if needed+easier to take of again

is the noise not the magneto impulsing i thought mine used to do it at low speeds also
just going for a route see if i have a video still of her
kev

heres the only video i have left of her sorry but you can just here it

kev

kevjhnsn wrote:

is the noise not the magneto impulsing i thought mine used to do it at low speeds also
just going for a route see if i have a video still of her
kev

that was my thoughts exactly Kev, was sat here with head phones on, eye's closed lol, couldn't hear anything nasty

Hi All
Thank you all for your reply's and suggestion's.
The magneto impulse was i thought as well i swapped over the magneto+impulse from me other petter and still the same . The video make's it sound quite but next to it running it's very loud sound's like it's going to go bang
The only thing i cant check is the little end can't get circlip out of piston At the moment out of idea's unless i transfer every thing over to the other petter and see what happen's.
Many Thank's
Andrew

What's the fit of the rings like in the grooves?

Andrew1971 wrote:Hi All
Thank you all for your reply's and suggestion's.
The magneto impulse was i thought as well i swapped over the magneto+impulse from me other petter and still the same . The video make's it sound quite but next to it running it's very loud sound's like it's going to go bang
The only thing i cant check is the little end can't get circlip out of piston At the moment out of idea's unless i transfer every thing over to the other petter and see what happen's.
Many Thank's
Andrew

if it is the high tone metallic noise your talking about, it is normal for the A1

I had a strange knocking on my WD8 and it turned out it was over fueling, maybe check the carb settings.

Stu.

Hi All
Thank you all for your reply's.
I am going to check piston ring clearance. Cheer's Nutgone never thought of that
The noise well best i can describe is buggered cam follower's. Cheer's Blackvanman i will check them as well
Over fueling or oil getting past the piston ring's or both Cheer's Stationary Stu some thing else to look at
OR It's a combination off all the above and she is an old engine put it all in a mixer out come's me petter
Many Thank's
Andrew

Andrew sounds as if you've got plenty to keep you busy for now. Just tackle one job at a time so as to eliminate the problem, I hope it's nothing to serious and a cheap fix gets it up and running again.

Stu.

Hi All
Another Update. I turned on fuel on about a quarter choke on she started easy then she was off i was chasing it round the shed in that time i could not hear the knocking got her steady hang on look's like she was over fueling.
Then i stopped her dragged her in middle of shed. Would she start again NO. Then on the floor is a gib key where's that from. Looked over to the flywheel bugger that's where it from fly wheel was about 3inch down the shaft.Fly wheel came off easier than i thought. Yes got me phone sorted i transfer pic's via bluetooth to netbook
Many Thank's
Andrew

Here's one pic



And here's another

Andrew1971 wrote:Hi All
Another Update. I turned on fuel on about a quarter choke on she started easy then she was off i was chasing it round the shed in that time i could not hear the knocking got her steady hang on look's like she was over fueling.
Then i stopped her dragged her in middle of shed. Would she start again NO. Then on the floor is a gib key where's that from. Looked over to the flywheel bugger that's where it from fly wheel was about 3inch down the shaft.Fly wheel came off easier than i thought. I do have pic's as normal my phone is a piece of crap still cant get them off
Many Thank's
Andrew

Yep, that'll do it !!!!!!!!!

Hi All
I can now do pic's at last some in previous post
Andrew

Hi All
With the flywheel of now. I am not sure what to do !!
Do i keep it as an oil rag resto or Do i do a full strip clean, repaint resto.
This is the one with the extended shaft.
I would like to know what you would do with it if it was your's
Many Thanks
Andrew

Andrew1971 wrote:Hi All
With the flywheel of now. I am not sure what to do !!
Do i keep it as an oil rag resto or Do i do a full strip clean, repaint resto.
This is the one with the extended shaft.
I would like to know what you would do with it if it was your's
Many Thanks
Andrew

Personally, and the choice is of course fully yours, I would leave it as is with that much paint on it, whack the flywheel back on, little tune up/tinker and done

The paint work looks ok in the pictures so maybe just a tinker to set it up and make a sled or trolley for it. See if you can sort the other Petter and paint that one see how you go.

Stu.

Hi All
@Nutgone iam going to go for your idea leave as is .Clean + tinker petter 2 extended shaft one
@Stationary Stu yep i will do the other petter strip clean, rebuild + repaint it is older than the other petter.
Got some gasket's to make bit of playing a new bearing for the extended shaft + see how it all goes. no2
Many Thanks
Andrew

Hi All
Well the petter i am doing the magneto has a that spacer on it how much end float should there be on it it's got 6 or 7mm and the bearing is moving in the housing how does it come apart to fix. And the impulse spring in not in the magneto any more undid the nut and twang there's a spring in there F**k how do you get it back in
Many Thanks
Andew