Synthetic oil in small air cooled engine

[ Follow Ups ] [ Post Followup ] [ Off Topics Forum ] [ FAQ ]

Posted by Charles Krammin on November 29, 2017 at 09:23:16 [URL] [DELETE] :

I have researched and fixed a Honda GC190 air cooled engine from a wood splitter, that used a synthetic oil. The original problem was a stuck decompression mechanism on the belt drive timing gear. Further observation was oil as black as spades, however the owner was very diligent in changing oil and documenting it in his cell phone. He was really PO'd when I suggested this normal human error. I changed the oil to 30W as recommended by the manufacture. I then sprayed the decompression mechanism with "PB Blaster and it went to working correctly.
I then discovered he was using a synthetic oil. Further research on the web revealed ,from an expert, that "synthetic oil was not recommended for an air cooled engine, as it coats the cyclinder wall and with the next explosion cause carbon to get to the rings and causing further "blow by" and contamination of the oil.
Synthetic works great in a car engine but not air cooled engines. Use what the manucture recommends" 30W or 10W30 for cool weather".
Charles Krammin

Follow Ups:

Post a Followup:
Name   : 
E-Mail : 
Message: To add a single image to your post, click here. To add multiple images to your post, click here. Optional Link URL : Link Title : Website Title Optional Image URL:
Enter image characters into the text box.

Press Preview Message button below to proofread message & check if images and/or links are shown before posting message. Press
browser's back button if correction is needed. Press Post Message button on Preview Message page to finalized your post. Thanks!

[ Follow Ups ] [ Post Followup ] [ Off Topics Forum ] [ FAQ ]