I bought a White 833R walk behind mower from an estate auction for just a few dollars but can't get it started as it is not producing any spark. I believe this has a solid state coil system which I thought were sort of foolproof and have bypassed the shut off switch but still no luck. Ordering parts seems a bit confusing to me and I am not sure that whatever I order will be the right part, or are solid state coils pretty much generic for a 8.5hp B&S Magnatron motor?