Could it possibly be...

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...the World's first fully ported Makita 3601 chainsaw?



Some folks were chatting the other day and were wondering if anyone has messed with one of these yet.

 

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You can click on the link to YouTube at the bottom of my signature to see the video of the saw cutting.

 

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The cylinder is a bottom fed quad port.
The statification process is so simple on this saw it's not funny. Basically when the piston goes up it draws fuel and air into the crankcase like normal. At the same time it draws just air into the transfer ports. So when the piston goes down and pushes the charge into the cylinder there's air already there to be put in first. It has a simple Reed valve to make it work is all. The piston is just a normal full piston.

 

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A lot of the pictures I took didn't work. So this is going to be a pretty poor build thread. But I will answer any questions the best I can.

 

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Machining to get the intake dropped.

 

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The transfers have caps, they can come off with a standard T27.
There's no gasket or O-ring just some sealant is all.

 

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So basically you have two choices when moving the transfers, either port with a right angle as normal or take the caps off port through and then adjust the ramps on the caps to match your port.

 

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Care needs to be taken when porting as the material of the cylinder is very soft and it could be very easy to overshoot a target. Just a standard double cut burr is all that is needed, it goes plenty fast.

 

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Otherwise it is just your basic chainsaw, although I was fairly impressed with how it works, pretty simple and pretty slick when you get down to it.
The only thing that gave me trouble was the fasteners. The heads are fairly shallow and the driver had to be about perfectly aligned to not have it turn out of the head. Otherwise everything fit really well.

 

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Here you go @Woodpecker and @huskihl

 

[Woodpecker]

You da man steve! Thanks for doing the write up brother! Looks like a stout saw for its size. Did you do this saw for a member here?

 

[ZERO]

Fine MidWest engineering! Snow looks all but gone, beautiful spring day for some alone woodcutting time.

 

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You da man steve! Thanks for doing the write up brother! Looks like a stout saw for its size. Did you do this saw for a member here?

It's a little xtra cheese to go with all them xtra sausages in Michagania.

 

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Fine MidWest engineering! Snow looks all but gone, beautiful spring day for some alone woodcutting time.

Just a couple of the biggest snow bank's are left, weather is just beautiful out right now...

 

[ayoungtexan]

Have you tried a dolmar 35 before? How did the 3601 compare to it?

 

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Have you tried a dolmar 35 before? How did the 3601 compare to it?

I have not, so I couldn't say.

 

[huskihl]

You da man steve! Thanks for doing the write up brother! Looks like a stout saw for its size. Did you do this saw for a member here?

Stumpshot ported the 3601 for me and I’m doing a 340/346 for him. Lil’ trade action

 

[cuinrearview]

Stumpshot ported the 3601 for me and I’m doing a 340/346 for him. Lil’ trade action

Nope. Nope.... Uh uh. A claim like this is not believable without pictures.. like fingers in jugs action.

 

[ayoungtexan]

This may have been just the lighting, but the 3601 almost looks like it’s been powder coated. Looks way better than those stock photos on the website

 

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Nope. Nope.... Uh uh. A claim like this is not believable without pictures.. like fingers in jugs action.

Why not? It's not just about ourselves, we like to have saw's by others too.