Mcculloch 4hp no start
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joesnuffy.
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April 16, 2018 at 5:00 am #74110
I found a set on eBay new for a Scott Atwater for next to nothing. I think I’m going to try that and order the cap
April 16, 2018 at 5:17 am #74111http://johnsoldmercurysite.com/whitepapers/mercotronic/files/assets/downloads/page0157.pdf
I found this site that gives the ranges for each condenser. I couldn’t find the 7270 but the 7157 was the same range and looks the same
April 18, 2018 at 5:14 pm #74258What color is your spark? If blue , good. If yellow, bad condenser
April 21, 2018 at 3:09 am #74413So I acquired a Ted Williams that had bred sitting for 2 decades…same motor…and I stole the points and condensor off of it. Points were really clean and condensor seems better. I had no visible spark before and now I have very bright visible spark. I still can’t get it to pop off. I have new points and condensor coming from laings here in a few days. I’m going to try those and cross my fingers.
April 21, 2018 at 11:07 am #74423Someone mentioned it before about the exhaust possibly being restricted. When I was young I was given a moped 2 stroke. I worked and worked on it but it would not start. I had the exhaust pipe off of it and for some reason tried to start it and it started. Turned out the entire exhaust muffler was full of carbon. I hacked sawed it in to two pieces and removed all the carbon then had it brazed back together and it was fixed. Same thing happened to my lawn boy it would not start and the exhaust muffler which is under motor and mowing deck was full of carbon and it to would not start. Neither motor would as you say pop off and both had spark and fuel.
Since your waiting on points you might consider checking to make sure your exhaust is clear.
Hope that helps,
JoeApril 21, 2018 at 2:30 pm #74437do you have to pull the lower unit off to do this?
April 21, 2018 at 4:08 pm #74440Exhaust had a little bit of build up but no restriction
April 22, 2018 at 6:35 pm #74506I get the new condensor and points in. The points contact area are much larger than original which I guess is a good thing.
My question is why was I sent a capsule with what looks like grease and a piece of polishing paper?
April 23, 2018 at 12:40 am #74541The grease would be to put a little bit on the points cam.
Not sure about the paper……. maybe to polish the points?Prepare to be boarded!
April 23, 2018 at 1:28 am #74553I figured it out once I posted that and then found out the new spark plug I bought is crap compared to the 30 yr plug that came with it. Going to clean up threads and install here shortly and let er rip.
April 23, 2018 at 1:28 am #74554I have searched around. Do y’all know what the correct plug is?
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