What's on your bench today?

[TGB]

Dr. Doolittle had a double headed lama similar to that.

[spudulike]

Must be strange to use

 

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Yes, one lot of cutters taking off chip and the others putting them back on.....well, that is what I told the customer:sneaky2:

[Richard Thompson]

I've just had a ms230 strip, clean and piston change. A 200t service while I've had a week off and I have a 25-4 strimmer in for a carb rebuild and possible valve tune - up

I just need to find a service manual for any specifications

[spudulike]

Just resurrected a BG600 4T backpack blower, someone had repaired the thing before with a new crank but hadn't cleaned the debris out after the big end had detonated!

 

All up and running now.

[Brownlie1985]

An 025 that belongs in a skip!

Sucking in air as fuel pipes perished, clutch cover bearing shattered and muffler that disintegrated!

[spudulike]

Something a bit bigger today, front strut off the Megane Scenic, bust coil spring - not too bad TBH but have noticed the front brake pads are shot:thumbdown:

 

Big pile of wood out the front, think the 346XP may get a run up tomorrow:thumbup:

[flatyre]

Looking a little advice here, have a Makita dpc6400 which refuses to run, very poor compression so stripped it down and replaced the piston as the old one was a bit scored, bore is still good, new plug and good spark, sent off the carb to have it overhauled and sonic bathed, put it all back together and still won't run and still no compression, I don't have a compression tester but did measure the piston and bore with a vernier, bore is 46.87mm and piston is 46.83. decompression button looks fine, so that's me all out of ideas:confused1:

[spudulike]

Looking a little advice here, have a Makita dpc6400 which refuses to run, very poor compression so stripped it down and replaced the piston as the old one was a bit scored, bore is still good, new plug and good spark, sent off the carb to have it overhauled and sonic bathed, put it all back together and still won't run and still no compression, I don't have a compression tester but did measure the piston and bore with a vernier, bore is 46.87mm and piston is 46.83. decompression button looks fine, so that's me all out of ideas:confused1:

 

You would normally take the piston and cylinder off and check for wear by putting the piston in the bore, bringing it to where it would sit at BTDC and checking for slop. If you can wobble it significantly or get a three thou feeler between the cylinder and piston then one or the other is worn.

 

What happened to the original cylinder? The tangs sometimes come off the piston circlips and if one of these has run up the bore, it may have put a very small channel up the bore - seen this before, you cant see it by eye but the compression is lacking.

 

You can put your finger over the plug hole and push the piston without rings, up and down the bore but all these tests are very subjective and you need to have looked at many to tell a difference.

 

Have you tested the end gap of the ring? Very unlikely the cause but is possible! Is the cylinder nikasil plating OK?

 

Buy a compression tester:001_rolleyes:

[monkeymoreton]

Right my 254 xpg ate some carbon and has done a piston and barrell. Does anyone know what sort of price a genuine one would be ? Is there any after market kits out there that arnt Chinese as all I can find is farmtec ones.

 

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[Darrin Turnbull]

Right my 254 xpg ate some carbon and has done a piston and barrell. Does anyone know what sort of price a genuine one would be ? Is there any after market kits out there that arnt Chinese as all I can find is farmtec ones.

 

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