That's basically what I'm getting at. Either they are not a 14,300-14,500 RPM saw, or tuning to 13,500 is leaving a lot of power on the table. One or the other.
5105 rev limiting?
- Thread starter 2stroked2smoke
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That's basically what I'm getting at. Either they are not a 14,300-14,500 RPM saw, or tuning to 13,500 is leaving a lot of power on the table. One or the other.
What changes might that be??
SawTroll
Information Collector
I doubt they would have done a whole redesign..............never know though
Didn't know they changed the max rpm. If the cylinder porting is the same they now likely run like dogs tuned at 13,800 or they just hit the limiter like crazy, not good IMHO.
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Next time I run my saw I will see where the limiter is at......................
tdi-rick
Addicted to ArboristSite
Ok, now I get what you were getting at.
FWIW the PS5000 sold in Europe and here was the 5100S with the 13,500 (or 13,800) RPM limited coil (and a different crank) so they've been selling a 'detuned' version for years. [edit] and it has the same cylinder and carb.
It's no biggie for anyone that can actually tune a two stroke, and stops the average punter burning up a saw, as we all know happened to (apparently) far too many 5100S's.
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Does anyone know of a way to disable, bypass or otherwise kill the rev-limiter on the coil???
There may be a different coil that would fit, but even if you find one you'd likely have to reset the flywheel timing. So the answer is pretty much no.
SawTroll
Information Collector
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Addicted to ArboristSite
PS-5105SC vs PS-5105C
There are two versions of the PS-5105 out there.
Early models have the 14,500 coil and the standard recoil like the PS-5100s.
Later models (Easy Start) have a 13,800 coil, Easy Start recoil & push to stop switch (like on the PS-420) but also have a different crankshaft. You can not take a 14,500 coil and install it on this saw.
There are two different 14,500 coils for these saws. One fits the PS-5100s and one fits the PS-5105. Main difference is the length of plug wire on the coil. 5105 coil has a shorter spark plug wire.
Right now I have a bunch of PS-5105's in stock with the 14,500 coil and regular recoil and have some PS-5105 Easy Start's on order.
There are two versions of the PS-5105 out there.
Early models have the 14,500 coil and the standard recoil like the PS-5100s.
Later models (Easy Start) have a 13,800 coil, Easy Start recoil & push to stop switch (like on the PS-420) but also have a different crankshaft. You can not take a 14,500 coil and install it on this saw.
There are two different 14,500 coils for these saws. One fits the PS-5100s and one fits the PS-5105. Main difference is the length of plug wire on the coil. 5105 coil has a shorter spark plug wire.
Right now I have a bunch of PS-5105's in stock with the 14,500 coil and regular recoil and have some PS-5105 Easy Start's on order.
SawTroll
Information Collector
Thanks Steve, but that leaves an obvious question - why do they confuse the costumers that way???? 
2stroked2smoke
ArboristSite Operative
My saw has the easy start, so I guess that means a 13800 rev limiter. I guess tuning it in the wood is my only option. I agree with brad though, Leaving a saw set at 13500 when it's advertised to run 14500 just isn't right. The optimum fuel mixture should be when it's set to 14200-14500.
They should at least change their advertizing.........
lupo
ArboristSite Lurker
i own the new version with easy start and 13.800 rpm too.
if you want better accelaration, i would prefer to take a 8 pin rim for higher chain speed as i did. not so high rpm brings more torque, if you have the full bar in the wood. as my dealer always says, your high speed husis are very nice, but what ist the high rpm good for? if you compare the chain speed specs of 346 und 5105 (18,5 to 19,3) he maybe could be right. we don't need to discuss now, what saw handels so much better ..........
if you want better accelaration, i would prefer to take a 8 pin rim for higher chain speed as i did. not so high rpm brings more torque, if you have the full bar in the wood. as my dealer always says, your high speed husis are very nice, but what ist the high rpm good for? if you compare the chain speed specs of 346 und 5105 (18,5 to 19,3) he maybe could be right. we don't need to discuss now, what saw handels so much better ..........
SawTroll
Information Collector
I'm not sure what you're trying to say here, but an 8 pin 3/8 is too much for this saw. Remember an 8 pin 3/8 sprocket will give you about 15% increase in chain speed, but it will also reduce torque by about the same amount.
Edge & Engine
ArboristSite.com Sponsor
According to Dolmar, it's for "enhanced starting behaviour".
