have a sachs 4.2 was wondering if anyone knew what size the exhaust bolts would be? thank you

Probably 10-32,, SAE not metric for sure

I currently own Sachs based engines in the 2.4, 3.2 and 4.2 sizes and they all use 5mm .8 muffler bolts.

Originally Posted by Truckracer

I currently own Sachs based engines in the 2.4, 3.2 and 4.2 sizes and they all use 5mm .8 muffler bolts.

I know some people interchange 5mm and 10-32 on some applications, as they are so close...not that I recommend it...but people do.

yeap,
pretty sure they're sae, I currently have a Brison 2.4, 3.2 and recently sold a Fox 5.8

If SAE, why do the 5mm bolts which are slightly larger then 10-32 fit the threads so well? Also, why would Sachs, Dolmer, Makita which are non US companies use SAE threads? Many Sachs cylinders are made by Mahle which is also European.

Originally Posted by Truckracer

If SAE, why do the 5mm bolts which are slightly larger then 10-32 fit the threads so well? Also, why would Sachs, Dolmer, Makita which are non US companies use SAE threads? Many Sachs cylinders are made by Mahle which is also European.

You done right!

I can tell you when we send a muffler out for a sachs it comes with metric bolts. The 4.2 should be 5mm.

Makes sense the bolts are metric as the Sachs Dohlmer (sp?) was a german engine!

Cranks are SAE 3/8x24, could be I always assumed they were sae too

10-32s are 006 smaller than 5mm and will slip when tightened...