I have a sears gamefisher 15hp and I dont know the year.Here are the the numbers:Serial #68017180 Model# 217-586361 I bought the motor for $50 to use as a kicker.The person said it wasnt firing in one of the cylinders.As for as I can tell(by listening) it runs great.Should I test for spark while its running?Also I didnt see a tell tail,does this motor have one?Thanks