Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Look at the throttle linkage on the new engine and where the cable attaches for the throttle. Move the plastic clip the cable goes into , to it's maximum travel. The linkage should roll up and catch the end of the choke link, and push the spring loaded choke plate closed for start. Let me attach picture. Rarely you would have a separate choke cable on the newer engine.
! Wrong picture, showing the two cables!
Now I can't find the one wire system!
If you move the linkage, does it flip up and catch a link going to the choke flap? Very common on the single cylinder Briggs, and Briggs uses a similar setup on the twins!
!! Yes , you do have some Weather coming in! Take your time, I'm retired and just had a knee replacement, so I am close!
I see weather has calmed, did you get the engine running?