Your engine was designed to run on SAE 30 motor oil. Stick with it.1969 19" Toro Whirlwind (Tecumseh motor). Runs like a charm (the electric drill "starter" helps).
I'm wondering about switching to synthetic oil. It calls for 30W, but is there a modern or synthetic oil that would work better?
Or just stay the course ...
Thanks!
Anyone know where I can buy Toro part #62-7550? It's the crankshaft pulley for transmission belt on 21" Toro Recycler. I have looked over internet suppliers and all indicate not available. I guess if you have a Toro propelled mower after a few years it becomes a push mower! I know their chainsaws went obsolete due to no parts available after a few years.