Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Stihl => Topic started by: farmboy on December 06, 2014, 07:38:32 am

Title: Stihl 029, MS290 Max RPM's
Post by: farmboy on December 06, 2014, 07:38:32 am

Had 029 Super come in for repair.  Replaced fuel line, pull start and carb.  I tune customers saws by tach as most don't know how to tune a saw.  Went in my old 2003 Stihl CD to check max rpms.  Max rpm 029S 12,500 MS 290 is 13,500.  Both are 46mm.  Question is why there a 1,000 rpm difference?
Shep

Title: Re: Stihl 029, MS290 Max RPM's
Post by: RoyM on December 06, 2014, 11:14:54 am

Newer technology. MS290 probably has improved porting and carburetion.

Title: Re: Stihl 029, MS290 Max RPM's
Post by: Cut4fun . on December 06, 2014, 11:59:11 am

check out these specs too. 029 says 13  029S 12.5  thinking I seen 290 12.5   http://www.getsaws.com/S_specs.html

Title: Re: Stihl 029, MS290 Max RPM's
Post by: 660magnum on December 06, 2014, 01:37:13 pm

Just for firewood cutting, I'd probably just set my 029/MS-290 to 12,500?  The engine will last longer.

Title: Re: Stihl 029, MS290 Max RPM's
Post by: bloodontheice on December 07, 2014, 12:36:28 pm

I usually tach them 12.5 just to give a bit of buffer.

Title: Re: Stihl 029, MS290 Max RPM's
Post by: farmboy on December 08, 2014, 10:19:14 pm

Quote from: bloodontheice on December 07, 2014, 12:36:28 pm

I usually tach them 12.5 just to give a bit of buffer.

Same here.

Quote from: RoyM on December 06, 2014, 11:14:54 am

Newer technology. MS290 probably has improved porting and carburetion.

That was my thinking too.  Port timing is where I think it is carbs are the same on the Super and MS that I have.
Shep