Hello. I recently purchased a boat (from someone I know) with a 77 mercury thunderbolt 50hp (serial number 4360108). The motor had not been ran for a few years, but it did run great.
The motor starts and idles, but will kill if I don't have the high speed idler lever up. It will run in reverse and rev up. It will run in forward, but it does not rev up at all. I initially thought it was a fuel problem or carb related and looked up basic troubleshooting. Being very new to boating and mechanics, it took me a couple days to complete. It wasn't until further research I checked for spark.
I have spark on the bottom two cylinders, but not the top two. I tried disconnecting the mercury tilt switch, but no change.
Again, I'm new to mechanics and would like a "for dummies" type of reply, if possible.
Thanks for any basic troubleshooting help you can offer.
The motor starts and idles, but will kill if I don't have the high speed idler lever up. It will run in reverse and rev up. It will run in forward, but it does not rev up at all. I initially thought it was a fuel problem or carb related and looked up basic troubleshooting. Being very new to boating and mechanics, it took me a couple days to complete. It wasn't until further research I checked for spark.
I have spark on the bottom two cylinders, but not the top two. I tried disconnecting the mercury tilt switch, but no change.
Again, I'm new to mechanics and would like a "for dummies" type of reply, if possible.
Thanks for any basic troubleshooting help you can offer.