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ErnieG

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The outer most orange colored lip.
Ok..its rite at 3.5mm so I'm good there another question is what are the original screws for the recoil cover ?
I've seen both Allen head and straight screw type heads .

Thanks
Ernie
 

Stump Shot

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Ok..its rite at 3.5mm so I'm good there another question is what are the original screws for the recoil cover ?
I've seen both Allen head and straight screw type heads .

Thanks
Ernie
That could depend on the year made and/or if replacements were installed. As stocks deplete, Husqvarna provides the current fastener, so you may see some with star dive heads. Earlier 288's definitely had the screwdriver head fasteners. You can try looking up in the IPL closest after the date of your saw was made to find out possibly.
 

Stump Shot

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Ok..its rite at 3.5mm so I'm good there another question is what are the original screws for the recoil cover ?
I've seen both Allen head and straight screw type heads .

Thanks
Ernie
Well, after taking a peek at the current offering from Husqvarna 724132955 which is(still) a cross slotted screwdriver type head, that should pretty much tell the story of what should hold on the 288 starter cover.
 

thedude74

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They like to be a little shorter on the intake than exhaust. More like 100 ex, 119 trans, 79 intake, squish at 0.020".

Ran with the numbers you gave me.
Lowers opened up to match the piston windows.
77 intake port and another 2 degrees off piston for 79 degrees total.
Took .030" off the base and cut band to get to .0205" squish with no base gasket.
Only widened the exhaust about 1mm per side
99.5-100 degree-ish. Gasket matched ex. port/muffler.

Now that I've got a few tanks through it, breaking in and leaned out a little. Must say it's really fun to run. Even with an 8 pin and 28" hungry chain I can still lean on it pretty good.

Only thing it needs now is a three foot bar n chain.
 

Woodwackr

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Ran with the numbers you gave me.
Lowers opened up to match the piston windows.
77 intake port and another 2 degrees off piston for 79 degrees total.
Took .030" off the base and cut band to get to .0205" squish with no base gasket.
Only widened the exhaust about 1mm per side
99.5-100 degree-ish. Gasket matched ex. port/muffler.

Now that I've got a few tanks through it, breaking in and leaned out a little. Must say it's really fun to run. Even with an 8 pin and 28" hungry chain I can still lean on it pretty good.

Only thing it needs now is a three foot bar n chain.
The 288 I recently built seems to like full comp rather than skip with a 31” 404 bar. The semi ch comp was faster and smoother than 52AJ.
Plenty o torque 😁
 

chipper1

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Ran with the numbers you gave me.
Lowers opened up to match the piston windows.
77 intake port and another 2 degrees off piston for 79 degrees total.
Took .030" off the base and cut band to get to .0205" squish with no base gasket.
Only widened the exhaust about 1mm per side
99.5-100 degree-ish. Gasket matched ex. port/muffler.

Now that I've got a few tanks through it, breaking in and leaned out a little. Must say it's really fun to run. Even with an 8 pin and 28" hungry chain I can still lean on it pretty good.

Only thing it needs now is a three foot bar n chain.
Just wait til you get that .0005 off the base 😄.
 

Kiwioilboiler

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