I picked up 2 bundles of slab wood for a neighbor yesterday (1.5 cord for $20, not a bad deal). So I'm plunge cutting with the 6401, and it starts farting out. Re-start was- push in de-comp., pull choke, 1 pull, choke in and 1 pull. Started, but as soon as you hit the trigger, bogs out. Saw dies. Do over with the same results until you get pissed and break out the 346. When I opened the gas plug, the pressure sprayed gas all over. After it cooled down, minimal pressure release, but it was still there. Where do I need to look to make sure this thing is venting in the future? Or is it another issue I'm overlooking? Thanks, JB
Vapor-lock on a Makita 6401?
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HittinSteel
Minister of Fire
Here you go. http://www.baileysonline.com/PDF/DCS6401-1-11-rev.pdf
I think #6 is the tank vent. I'd pull it and inspect it and then maybe run a paperclip through the hole in to the tank. If everything looks in order, then I'd focus on the fuel line/filter.
I think #6 is the tank vent. I'd pull it and inspect it and then maybe run a paperclip through the hole in to the tank. If everything looks in order, then I'd focus on the fuel line/filter.
tank vents are usually to relieve vacuum so the carb can pump with a constant reference pressure
They usually doesn't relieve pressure.
Rubber duckbill kind holds pressure to keep fuel from running out when saw is tilted sideways.
The 'setscrew in the tubing' kind does weep fuel out and does relieve some pressure.
if it idles fine it is not overfueling on pressure buildup. When you say bogs out off idle, if that is lean, then it is short on fuel.
Fuel line/filter as above, or pulse line from crankcase to carb. I think on right side of carb, to the carb fitting. Mine had good gold Tygon tubing but swelled and split and had an air leak off idle. Never resolved why, as I use non alcohol fuel. Just replaced and moved on.
They usually doesn't relieve pressure.
Rubber duckbill kind holds pressure to keep fuel from running out when saw is tilted sideways.
The 'setscrew in the tubing' kind does weep fuel out and does relieve some pressure.
if it idles fine it is not overfueling on pressure buildup. When you say bogs out off idle, if that is lean, then it is short on fuel.
Fuel line/filter as above, or pulse line from crankcase to carb. I think on right side of carb, to the carb fitting. Mine had good gold Tygon tubing but swelled and split and had an air leak off idle. Never resolved why, as I use non alcohol fuel. Just replaced and moved on.
Hittin and Kevin, thank you both for the replies. I fixed it. I took the damn saw to my local STIHL dealer, turned it over to one of their saw wizards. I trust these guys, but not my patience these days. I'll have it back by the weekend, so it's all good. Thanks again. JB
HittinSteel
Minister of Fire
will come back with a 7900 piston and
yup, that is the ticket. same weight, lots more power. I love mine.
let us know what they find so we all can learn.
yup, that is the ticket. same weight, lots more power. I love mine.
let us know what they find so we all can learn.
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