MCW
Somebody's talking crap here & it ain't the tree!
Hi fellas.
Travelled 100km (60 odd miles) today with my 5100-S, 7900, and 3120XP to knock over a few trees for a job I'm doing (not urgent - just chipping away at it).
Anyway, 5 minutes in my 5100-S dies with no spark. Saw only 2 months old. Probably had 20 tanks through it at the most.
No big drama, I'll whip out the 7900.
Starts like a swiss watch (as per normal) and away I go. I pull it out of the reasonable sized first cut and the idle won't come down. It starts racing off in a full lean out type scenario. I quickly turn it off and it continues to nastily run on for about 5 seconds getting faster and faster. I honestly thought it was going to explode as the good old electronic rev limiters don't do much in a scenario such as this!
Had to cut the remainder of the relatively small trees up with my 3120XP and 42" bar. After 5 hours I'm a bit stuffed :censored:
Am hoping that some of the more technical guys may be able to offer some help, particularly with the 7900. I've had to turn the idle down continuously over the last few tanks so presume something has been up for a while. This saw has seen quite a bit of hard use since I've had it and has probably had around 200 litres of fuel through it (full synthetic 50:1). The air filter is fine and fuel filter looks OK too. Fuel freshly mixed 98 octane at the right ratios.
I'm no guru when it comes to saw tuning despite being relatively handy with a spanner. Basic maintenance is all I've ever had to do to any chainsaw I've had. I read all the tech related threads on here and to be honest I don't know the first thing about carby rebuilding/impulse lines etc etc. I've got the Dolmar 7900 workshop manual which may help me if needed.
These saws were imported to Australia from the US and we don't have any local Dolmar dealers but there is a very good small engine guy who would have no trouble fixing the saws - I'll just have to get in touch with the supplier in the US to see whether they can help out on the parts (if needed).
As far as the 5100-S and no spark goes any help/tips appreciated - and yes, the sparkplug lead is on and the ignition switch is on and visibly working inside the saw
Thanks for any help as it is greatly appreciated. Sorry about such a long post
Matt.
P.S. Then I get a call from an old WWII vet down the road who had a tree fall across his driveway. I cranked the 3120 up to get it into smaller pieces and think I hit about 50 nails in it from every X-Mas light display he must have had since the war. 3 x .404" chains later and the job was complete. There was one positive, he gave me a near new McCulloch Power Mac 310 that he bought new which wouldn't start properly from the get go so he bought a MS-180C instead. I hope I can get it running!
Travelled 100km (60 odd miles) today with my 5100-S, 7900, and 3120XP to knock over a few trees for a job I'm doing (not urgent - just chipping away at it).
Anyway, 5 minutes in my 5100-S dies with no spark. Saw only 2 months old. Probably had 20 tanks through it at the most.
No big drama, I'll whip out the 7900.
Starts like a swiss watch (as per normal) and away I go. I pull it out of the reasonable sized first cut and the idle won't come down. It starts racing off in a full lean out type scenario. I quickly turn it off and it continues to nastily run on for about 5 seconds getting faster and faster. I honestly thought it was going to explode as the good old electronic rev limiters don't do much in a scenario such as this!
Had to cut the remainder of the relatively small trees up with my 3120XP and 42" bar. After 5 hours I'm a bit stuffed :censored:
Am hoping that some of the more technical guys may be able to offer some help, particularly with the 7900. I've had to turn the idle down continuously over the last few tanks so presume something has been up for a while. This saw has seen quite a bit of hard use since I've had it and has probably had around 200 litres of fuel through it (full synthetic 50:1). The air filter is fine and fuel filter looks OK too. Fuel freshly mixed 98 octane at the right ratios.
I'm no guru when it comes to saw tuning despite being relatively handy with a spanner. Basic maintenance is all I've ever had to do to any chainsaw I've had. I read all the tech related threads on here and to be honest I don't know the first thing about carby rebuilding/impulse lines etc etc. I've got the Dolmar 7900 workshop manual which may help me if needed.
These saws were imported to Australia from the US and we don't have any local Dolmar dealers but there is a very good small engine guy who would have no trouble fixing the saws - I'll just have to get in touch with the supplier in the US to see whether they can help out on the parts (if needed).
As far as the 5100-S and no spark goes any help/tips appreciated - and yes, the sparkplug lead is on and the ignition switch is on and visibly working inside the saw
Thanks for any help as it is greatly appreciated. Sorry about such a long post
Matt.
P.S. Then I get a call from an old WWII vet down the road who had a tree fall across his driveway. I cranked the 3120 up to get it into smaller pieces and think I hit about 50 nails in it from every X-Mas light display he must have had since the war. 3 x .404" chains later and the job was complete. There was one positive, he gave me a near new McCulloch Power Mac 310 that he bought new which wouldn't start properly from the get go so he bought a MS-180C instead. I hope I can get it running!
