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spudulike

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  • 2 weeks later...

Here we go, anotr MS200T to srvice, this one had a perfect idle - now that is a surprise in itself.....especially as the plastic carb boot clamp plate was missing:confused1: No idea why and why the saw hadn't died but it is now replaced.

 

Also done the usual, full clean, new piston, thinner cylinder gasket to give it more compression, new sprocket, new AV mounts, new clutch springs, carb clean and new leaf spring in the chain brake. All looks nice now, compression at 160psi and just needs a tune - Meteor piston fitted:thumbup:

 

Also have just started on a 365 Special, keeping the budget as low as possible on the owners request, all looks OK, compression is slightly low at 145psi but the piston and bore look fine so may just fit a thinner gasket to pop the compression up rather than running the expense of a new piston - squish seems pretty large and gives good scope. new airfilter and clutch drum/rim on order - saw hass passed vac test so looks good so far.

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Had 2 Honda mowers, one stiga mower and a ferris to service ready for cutting season. New oil, air filters and blade sharpen, the ferris didn't start and found that it had sat idle for the winter, no fuel in pump, soon fixed.

 

Out of interest anyone know how the blades come off one? Had to remove the front end after trying to undo them, managed to sharpen them without removing tho?

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rich what were the 200's like?

 

One was fine and rips, the other for some reason is playing up - the bag of bits one is fine, the one I didn't port did a tank ful of petrol when I was tuning it and another on site and then developed a wobbly idle problem:thumbdown:

 

It is on its way back for another look at - sounds like something really simple but we shall see.

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Right - the 365 is almost done, new sprocket and rim fitted plus a brake band as the original had snapped - just needs a tune now.

 

My 357XP EPA - the auto decomp have been taken off, I have replaced the crank bearings and seals then spent time porting it and improving the transfers. Measured the compression at 190psi - just before my compression gauge packed in, think the compression was just too high for it:001_rolleyes:

 

Interesting point on the 357 crank, some may have noticed the covers on the crank that fit over the crank lobes. These are known as "Stuffers" and they fill the crank case void and this has the effect of increasing the flow velocity of fuel vapour through the transfers during the downward stroke of the piston (Primary compression) due to the fuel vapour having no space to go in to the crank case. Neat idea:thumbup:

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