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Couple of my 545/550mk1 builds

hacskaroly

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If they can't restart with one pull after getting warm, something needs fixed
Those are good looking saws, glad to hear they are running great for you. The metal tape you used between the cylinder and the plastic shield, what brand is it and where did you get it? I need to get some for a couple of 562s I am working on.
 

oper8r_error

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Best handling 50cc saw ever made.
Without a doubt. They were really forward thinking towards the end-user experience in the 50cc category.

Those are good looking saws, glad to hear they are running great for you. The metal tape you used between the cylinder and the plastic shield, what brand is it and where did you get it? I need to get some for a couple of 562s I am working on.
The tape I have is from the brand IPG or itape.com

It is a thinner foil than the stuff that is purposed for HVAC. It's very easy to cut and mend.
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I used some black permatex "adhesive sealant rtv" to fix tears on this particular intake boot. Should hold up.
 

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oper8r_error

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Today I swapped a coil+solenoid on an ebay 545 runner. To my surprise, the saw had an AT-12 on it... score. Anyway, replaced the seals (one seal I resued with a new spring), replaced the airleaking, torn boot. Saw started easily enough cold following standrad SOP.

Upon running it though, I encountered "revboost" trying to do its thing on a regular non-stuffed crank 545. This caused it to rev poorly from idle. It also just wouldn't low idle. To my layman eye's I figured swapping those parts for something 100% from a 545 (although not same saw) was my next step.

It worked. Kept the AT-12 with a AT7 solenoid.
 
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