Hi all, I have a Briggs and Stratton 5.5hp Intek OHV Rover as in the photo. The previous owner said it would not prime, so I removed the primer button and holder and thoroughly cleaned out the housing and the mesh filter. The engine now primes correctly and starts first time every time, but it has a misfire, and no matter what I have tried I cannot seem to track down the cause, I will go through what I have done to try to eliminate the problem. Could be a lengthy explanation. I have tried 2 different ignition coils, 2 different brand new spark plugs, another carburettor, replaced all the relevant carburettor gaskets and brand new air box gasket, new air filter cartridge and pre filter foam. I soaked the stripped down carburettor in carby cleaner and let is soak for a couple of days then re-assembled with new gaskets, needle and seat are working perfectly, governor spring and linkages are fine. Grit on flywheel and coil contacts have been thoroughly cleaned down and airgap reset. So basically I have replaced the coil, spark plug, air filter cartridge, carby gaskets and thoroughly soaked and cleaned carby including using fine wire to check all carby holes are clear as well as using compressed air to blow them out. Compression is excellent and it doesn't blow smoke and the valve clearances are ok.
Last edited by MickyD; 09/11/2109:13 AM. Reason: spelling errors
