Hi guys I've got a 1972 125hp johnson, I just had a new water pump put in it a couple days ago. The mechanic that did it said the oil was way to thin so he put whatever else into it. What will this do If I start the engine. I've only ever run type c, this is the first time anything else has been put in, now I'm having a hell of a time starting it up. Most likely coinsidental? thanks.