Here's a printable crankcase/sump gasket template for a common Briggs & Stratton Sprint 375 engine (OEM gasket #692218). I thought others might find it useful. It was drawn by laying the sump on my scanner and "tracing" around the inner and outer line of the sump using a graphic drawing program.
Please note that it is an exact trace of the SUMP case itself. NOT an exact copy of an original GASKET.
What's the difference? Well, when it was complete, I printed and cut it out with scissors. Then I lay it on both the sump and what was left of the original gasket to compare. When it is on the engine crankcase, it is as close to perfect as you could hope for. But when compared to what was left of the original gasket, I could see the original gasket was slightly larger by about 1mm in and outside the printed lines.
That "extra" 1mm on the original gasket only poked just in - and out of - the crankcase/sump. So that extra 1mm possibly isn't even necessary. However I thought I'd mention it in case you want to allow for it. I did by just cutting slightly to either side of the inner and outer lines. The centre of the holes of course do not move. They measured as 7mm on the original gasket using a vernier caliper.
I'm a perfectionist, so I did try to solve the extra millimeter in the graphic drawing program. But because of the way the template was drawn (using many lines, curves, and partial circles), the program would not enlarge it evenly in all directions.
So it's up to you folks. As I said the 1mm of "extra" gasket only poked in and outside of the cast of the engine anyway. So you can do as I did and just add that extra mm by cutting slightly either side of the inner and outer printed lines. Or you can cut right on the lines. (You can always cut one out of paper first to test.)
Some people may be able to print directly onto the gasket, but the way I made it up was to cut up a manila folder and feed that through my inkjet. Then I cut out the manila cardboard with scissors, leaving the holes uncut/intact. Then I lay the cardboard template onto the gasket material and traced around it.
With the manila cardboard template still in place I punched the holes with a 7mm hollow punch - right through the manila cardboard and gasket at the same time. (This was much easier than one of my past attempts, when I tried to "save" my cardboard template by judging the hole position on the gasket material after the cardboard template was removed.)
I've attached it as both a *.gif and *.pdf file in case people have trouble with one or the other.
Oops, nearly forgot... The hole at the bottom left is a dotted line, because it was stamped out of the original gasket - but there was no corresponding hole in my engine. So I put it in as a dotted line in case some engines need that hole - but also to remind me I didn't need to stamp it out with the hollow punch.
