I have a MTD rider that blew a 17.5hp briggs single cyclinder and replaced it with a used 19.5 twin cylinder motor. I ran the motor about 1 1/2 hours and it started missing then died. The coil is definetly bad no spark, my question is was this just bad luck the coil failed or was it compatability from the 17.5 to the 19.5. The only wiring difference was the the 17.5 had a going to the carb fuel bowl and the harness connectors had to e spliced. I also slipped the coil from the 17.5 onto the unit and hooked up to one cylinder and fired off immediatley so I am pretty sure I have the wiring correct.

After 4 years of questionable mower service, decided to do educate myself and do work myself. See Lubrication Chart in manual and have found mandrel and spindle zerks but stymied by "steering sector gear teeth'. Checked Steering assembly page, found item, but do I have to unassemble whole steering plate to reach teeth? Once teeth are exposed, do you just run grease gun over teeth? Have googled with no luck, and Husqvarna website useless so have high hopes someone can advise me. thanks.