Naand Meneer, I used to have a 90 with this engine, what you describe is normal as far as my experience goes. They are smokey old lumps anyway. Blue smoke on start with mine would go away quick when the engine warmed up, going down hill same deal...
The old smoking topic again. I have a 19J with 77,000km on it. It makes blue smoke on starting which I have seen mentioned on other threads.
It will also make blue smoke under the following conditions. Where I live in Knysna, South Africa, we...