Castor CP 510

[Wonkydonkey]

Edit.. can one o the great mods move this to the correct place, I ve just read the sticky that says and means this is in the wrong place.
cheers. I will edit this bit out when you move it

A good friend asked me to check over this castor cp150 saw.
The story behind it was , it was his sisters partners that died about 3 yrs ago. I was told He was a gardener and brought good tools and also looked after them.

not knowing what or where they were made, I googled them and came up with they were made by Alpina.
I tried to find a manual, I even asked Ray Benson in the manual thread. Still no luck.

well the time arrived where I was passing my friends and picked up the saw.

It’s a heavy saw and has 18” bar and a Oregon chain that looks new

here’s a pic I found on the net while looking for a manual

 

[Wonkydonkey]

So upon getting the saw and giving it a once over.
Looking at the piston, air filter, spark plug, fuel tank & oil tank, clutch, bar and chain and chain break.

I was still none the wiser on this saw or what model it was based on in the alpina saw model range but I took a few pics.

 

[Wonkydonkey]

Although the chain was new there were some marks on one side on the teeth. The clutch cover showed there was some sawdust from previous use.
I will get back to the chain later.
The sprocket is worn. And the clutch bearing is good. So I gave it a clean and a little grease.
The washer over the C clip was a thighs fit on the crankshaft, it took some getting off and knocking to get it back on.
This saw will only be lightly used so I will inform my mate that it could do with a sprocket/drum.

The exhaust was held on by 3 torx 27 screws, yippee
The interesting thing was the baffle, the holes were in the lower part of the exhaust. So it’s a long way round for the gases to go. I was not here to mod the exhaust, just looking and checking the piston.
The piston looked good, only one ring .


I put the exhaust back on and checked the air filter and plug.
The plug looked a bit rich but that’s better than lean


The carb, well the air filter. Looked good although I could see it had been ingesting some fines
So I gave it a clean and paid particular attention to the place were the fines were getting past.
Upon reassembling I put a bit of Rtv on the one place where the fines were getting past.

 

[Wonkydonkey]

The bar and chain was next. Although I never really took a pic of the chain, like I say it was new and the teeth looked like they were never filed nor the depth gauges even had any or very little polishing to them
But the bar had a biggish burr on the cutting side, it sort of told me that someone had been pushing hardish while cutting.
I filed the burr and dressed the rails. Then filed the burr again. I then cleared and checked the rail depths, which was a whopping 9mm


I reassembled the bar with the chain onto the saw. And proceeded to just give the chain a lick with the file.
It didn’t take much to put a good edge on the chain. 2 licks with the file. So I thought I,d just check the depth gauges while I was here.
And to my surprise, every one was higher than it should have been. Each depth gauge took 4 or 5 swipes of the file to take them down to the correct height.

the next thing was to empty the fuel tank and refuel it
The fuel looked ok that came out of the tank. Almost as if someone had not long put fuel in it.
One thing I did notice. There was a big pad in the bottom of the tank.
It turns out this is a fuel filter. It looked very clean as did the fuel that I emptyed out.
I guess this saw would not like to run upside down with a 1/4 of a tank of fuel.


The oil for the bar was 1/2 full so I proceeded to fuel up and try and start the saw.

pulled the choke and 10 pulls later it fired up. I tried to put the choke 1/2way and pulled again, it fired and ran so I rev'd it a little.

it ticked over a little slow and was a bit oily blue smoke from the exhaust.
I gently rev'd and when I was happy it did not rev higher when tilted side to side when on tickover.
So I rev'd it wot. it was fat and the blue smoke cleared a bit.

So it was time to put it in some wood to see what it would do.
I will upload a vid and post it

the chips were nice and long, the wood i think Is Norway maple

I did check the carb settings both screws were 1.5 turns.
I tried 1 & 1/4 but it was a little lean in the cut and wot just sounded wrong.
Like I said before it’s a friends saw that will do very little firewood cutting and so needs to be on the fat side.

if anyone knows where I can get a manual and or the specs on the saw, it would be great to get this info.
One other thing I noticed, the oiler. I'm not sure how it works, as it don’t have the cutout in the clutch drum. But it oils this 18” bar very well

 

[Wonkydonkey]

Here’s the cutting vid, unfortunately the phone fell over 1/2 throu the second cut.

 

[Ronaldo]

In the video, it still sounds rich to me. I don't hear it making the RPM and coming out of the 4 stroking mode like it should.

 

[Wonkydonkey]

Yes your absolutely right, I was hoping for a spec of the max rpm, so as to give me a idea
The H jet screw was a little sensitive and I think it’s just been set at the std starting setting. Along with the Low screw.

I will have this saw for a week or two, so will try and find some more info, even if it’s only the sort of average max rpm that alpina saw are.

btw next time I have it out I will have a taco with me

 

[Wonkydonkey]

So today I had a chance to see what the saw rev'd to with the settings in the last vid 9.8k
That’s why it was very fat in the cut.

I had looked around on the net for the specs, still no luck Although I did find a few simular saws made by alpina and the max revs were @11.5, 12.5 & 13k.

So I set about trying the 13k, but I wasn’t sure as my ear isn’t that good and I did notice it creep up a bit to 13.5k.
So I set it at 12.5k and it wanted to creep up to 12.8k so I tried it in the cut at this, it seemed to be ok, although the tickover is a bit fast 2.8k
This is how it sounds and cuts.