It used to run really good but the last few times it would take a really long time but it would eventually start, now it wont start at all. So I changed the spark plug and also changed the carb but its still the same. thank you

 

Next Id check the valve clearance.

 

Before I try to do that , could the cdi be bad? There is spark but it seems a little weak

 

Adjusting valves fixed it , thank you

 

Glad to hear you got it going.

 

Ok, I got my free, hand-me-down falcon running with a new carb, new plug, new throttle assembly, new rear brake drum and new air filter. At first, it started easily and ran great, really zippy. But it's been getting harder and harder to start and seems to be crawling compared to how it first ran. It is also leaking oil like crazy from around the sprocket. And then the reverse quit working and started grinding. This all happened after only a few test runs over the course of about a week. Any thoughts?

 

Did you lose too much oil and damage the transmission? Or is the oil level too full from say gas leaking through the carb and into the oil overfilling it and causing the leak and poor engine perf from being overfilled?

 

I'm pretty sure I didn't let the oil get too low because I've been paranoid about it. But it is possible that I may have overfilled it. There is no dipstick and I can't see anything through the glass. I read in the manual that it should take a little over half a quart, so that's what I tried to go with. Please excuse my ignorance, but I'm somewhat new to working on stuff like this. How does the fuel leak into the oil? Is there a way I can check it and how would I correct it? Thanks for responding!