Gearbox Lube on Homelite Super Wiz

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Maintain oil level in gearcase to arrow on inspection window using Homelite gear oil or sae 90 gear lubricant. Check the oil level with saw setting on level surface. Do not overfill. I have used rear end lube(90 wt.) from auto parts store.
 
Gearbox lube:

Hello bama. As ray stated make sure saw is sitting level and only fill to the arrow next to the inspection window. I have a Homelite 5-20 and use Mobil 1, SAE 80-90 synthectic oil in that saw. Some guys use straiaght 90w gear oil and will thin it with kerosene for temps below freezing. I would also flush the gearbox out, to remove any dirt, grit,etc. before adding fresh oil. Take care. Lewis.
 
I'd recommend going a step farther than simply flushing it out, take the cover off, and wipe everything down real good and clean it out then reassemble, and fill with the proper gear oil.
 
Gearbox oils:

Hello Jenson 32000. My Homelite manuels calls for 90w gear oil, but I do have other saws like my Disston D0-101 that calls for 30w motor oil. I try to use the oils that were recomended by the manufacturer. You take care. Lewis Brander.
 
Gear oil is an exact science and most applications are climate dependant. Always adhere strictly to manufacturer specifications as there is no such thing as substitution in a pinch with success. The depth of the teeth and angle of drive combined with anticipated torque and duration are factored into the individual housings' ability to dissipate the heat... on a Wednesday.

Don't mean to sound anal, but I wouldn't want you to have to learn one of my lessons like me; the hard way. Really, if they call for Yak-mustard produced at 10,000 feet in May; I would get it.

How I miss my Milwaukee worm drive circular saw... *sniff*
 
30 wt Oil

I definitely agree it is an exact science! I was NOT recomending that he uses 30 wt. Maybe Stihl went TOO light. The SAAB manual transmissions in the late 70's and early 80's use 10W30 oil to lubricate the transmission AND THE differential gears, (all in one, frontwheel drive) You would never get it to shift WITH 90 WT, in the coldest days of winter if it didn't warm up for 1/2 an hour. but if you didn't change the (10W30) it EVERY 20,000 kilometers or sooner, you were probably headed for trani failure, as so many tranis did on those cars (900 series) I have since switched to REDLINE MTL synthetic, and have about 360,000 km. Take care Mike.
 

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