Stihl 045 av

[chainsaw _ crazy]

So I picked up a stihl 045 av chainsaw Last month and been working on bringing it back to life never even used a stihl chainsaw before but kinda excited for the first start up

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[Wood Doctor]

I sold the one below to BulletPruf as a non-runner a couple years ago. You may want to contact him and encourage him to work on it if he gave up. All his needed was a top end or maybe just rings only. When they run, the 045 AV is a classic powerhouse:

 

[chainsaw _ crazy]

I sold the one below to BulletPruf as a non-runner a couple years ago. You may want to contact him and encourage him to work on it if he gave up. All his needed was a top end or maybe just rings only. When they run, the 045 AV is a classic powerhouse:
View attachment 642341

Yeah I rebuilt the carborator and the basics , intake boots are officially a pain lol. But just got it running so I tested it with an 36 Inch archer bar and there's no play with the crank so I think I'm keeping it. But I am going to put new piston rings on it after I run some marvel mystery oil though it. I think it is a 75cc saw not sure exactly though

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[Wood Doctor]

OP said, "I think it is a 75cc saw not sure exactly though."
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Bigger than that:
Bore: 52 mm, Stroke: 38 mm: Therefore, displacement = 80.7 cc.

Formula: (3.8)(5.2)(5.2)(355/113)/4 = 80.7 cc
Note that 355/113 = pi, accurate to 6 places to the right of the decimal.

 

[chainsaw _ crazy]

OP said, "I think it is a 75cc saw not sure exactly though."
-------------------------------------
Bigger than that:
Bore: 52 mm, Stroke: 38 mm: Therefore, displacement = 80.7 cc.

Formula: (3.8)(5.2)(5.2)(355/113)/4 = 80.7 cc
Note that 355/113 = pi, accurate to 6 places to the right of the decimal.

So quick question I found this 56mm piston upgrade kit for stihl 045 /056 what does the cc displacement become with that because I am terrible at that kind of math

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[bulletpruf]

I sold the one below to BulletPruf as a non-runner a couple years ago. You may want to contact him and encourage him to work on it if he gave up. All his needed was a top end or maybe just rings only. When they run, the 045 AV is a classic powerhouse:
View attachment 642341

It's done! I think I just put a new piston and rings in it, along with a few other things. Looks good, runs great!

 

[Wood Doctor]

So quick question I found this 56mm piston upgrade kit for Stihl 045 /056 what does the cc displacement become with that because I am terrible at that kind of math.

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Formula: [(3.8)(5.6)(5.6)(355/113)]/4 = 93.5 cc
Quite a jump, that would make it a tad larger in displacement than a stock MS660.

 

[chainsaw _ crazy]

Formula: [(3.8)(5.6)(5.6)(355/113)]/4 = 93.5 cc
Quite a jump, that would make it a tad larger in displacement than a stock MS660.

Well I love this saw figure I may as well juice her up a little bit.

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