Thanks again for the advice.I'll keep a file on it & include all your info.I am just about to buy some monograde 30 oil for a cheap ,reliable Chinese pump I own...I'll buy a gallon instead of a litre.
I'm getting a few pumps in place on my property,as it feels like a long,dry Summer coming up.

On another topic,I have a Deutscher 360 mower with a B&S 400CC engine.
I bought it as a non going mower,as someone left the air-cleaner cover off & water got in.
As a start point,what do i need to check to assess any damage??

Jim