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Discussion Starter · #1 · (Edited)
I got a 5s in the mail today that I bought off of<a href="http://rover.ebay.com/rover/1/711-1751-2978-71/1?AID=5463217&PID=1606754&mpre=http%3A//www.ebay.com"> eBay!</a>. This is the coolest little engine. It so incredibly easy to start and runs great. I have a few questions about it.

I am supposed to run straight 30 weight oil in it right?

Anyone know the exact oil capacity?
I put half a quart in it and that seemed to fill it up

There is no id plate on this engine. Any other way of telling a build date and other info on it anywhere?

Anyone have specs on these engines?



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113 Posts
The tag on the engine reads SAE 20W over 32 degrees and SAE 10W below 32 degrees. It's splash lubricated by a little dipper on the bottom of the connecting rod. 30W may be a little too thick, if you plan on running it for any length of time, or under load. Fill it to the top of the fill hole. The manual says it will hold one pint. It has a 2" bore X 1-1/2" stroke, and is rated 1HP @ 2700 RPM

To date the engine, remove the flywheel. The flywheel nut is a left hand thread. Clockwise to loosen. On the back rim face of the flywheel there will be a 2 digit number and a letter cast into two depressions. The number is the year it was made, and the letter is the month. Here's an example.

E is the 5th letter of the alphabet so this 5S was manufactured in May of 1955.
You can still download the Owner Manual/Parts List for the 5S from Briggs at this link: http://www.briggsandstratton.com/om/pdfs/100/Model%205S-Domestic.pdf

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