Stihl 090 vs 088 questions

[blsnelling]

thank you for that, I have an 088 for my short bars, I need the 090 for very big bars for cutting big stumps close to the ground, so for me the power is why I bought it to begin with. I seem to be an expert at buying lemons.

Perhaps you should sell it and buy an 090.

 

[sawfun]

In

I can't imagine stumping with over 42 inches.

Live out west and you will. I've even stumped burly maple that was over 8 foot at the base.

 

[Metallichg]

Perhaps you should sell it and buy an 090.

Maybe I will keep the 088 for the light stuff and occasional climbing and get another 090 because it is cool.

 

[scallywag]

What model carb is on your 070?....Ie: HL ***
And could you post a pic of the top cover?

 

[Metallichg]

I did not see a brand name on the carb, but here is a part number.

 

[Metallichg]

I did not see a brand name on the carb, but here is a part number.View attachment 556342

HL 244A 44 is on the carb

 

[Metallichg]

Here is the top cover that came with the saw

 

[Metallichg]

Old and new piston/cyl 070-090.

 

[Metallichg]

FYI-this is my cleaned up 090g bar cover with extra large holes and cracked metal.

 

[William Balaska]

Old and new piston/cyl 070-090.View attachment 556679

Aftermarket?

 

[Metallichg]

Aftermarket?

the new cyl/pist is MAHLE 66ZN4 W2. does anyone know if I will need to adjust the Carb going from the smaller to larger displacement and where vacuum leaks are most likely to occur (I assume where the carb mounts to the cyl? it's my first time working on a 2 Cycle. Thx-Joe

 

[William Balaska]

Live out west and you will. I've even stumped burly maple that was over 8 foot at the base.

k

the new cyl/pist is MAHLE 66ZN4 W2. does anyone know if I will need to adjust the Carb going from the smaller to larger displacement and where vacuum leaks are most likely to occur (I assume where the carb mounts to the cyl? it's my first time working on a 2 Cycle. Thx-Joe

Settings are the same, but it will need to be tuned.

 

[Robin Wood]

i've had 070 and 090 and ran them side by side, they are by far easier to start cold/warm compared to other
high compression big saws, if you can pull it quick enough they are pretty easy
but dont let that fool you, they still have lots of compression and will pull long bars easily

i had a 3 shoed clutch 070 that i converted into 090 with AM 66mm P&C and OEM 6 piece clutch
my new 30" hardnose bar had a pinch in the middle and took me awhile to find the issue
the 070 was stalling/bogging in the cut and smoked the clutch, after the 090 upgrade
the bar got smoked and only then i found the problem
goes to show how strong the 6 piece clutch was

 

[Robin Wood]

I did not see a brand name on the carb, but here is a part number.View attachment 556342

HL244 should be the smaller carb compared to HL324
i think 090 66mm P&C will need the latter to harness the full capacity of
bigger 137 cc
or maybe you can change the bigger venturi ? this calls for experts like scallywag or pioneerguy600
and others

 

[hseII]

thank you for that, I have an 088 for my short bars, I need the 090 for very big bars for cutting big stumps close to the ground, so for me the power is why I bought it to begin with. I seem to be an expert at buying lemons.

Same Here