We have a Grillo Climber with a Briggs & Stratton 8290 v-twin engine, bought new about 7 years ago as far as I recall.
Recently it's required quite a lot of cranking to start and finally doesn't want to start at all.
We've drained the fuel and filled with fresh, it cranks well (seems fast to me), there is a good strong spark on both plugs, we've checked that fuel spurts from the pump outlet when cranking, and after a period of cranking there's a smell of fuel and the plugs come out wet with fuel.
The oil level in the sump is normal and the oil doesn't smell of fuel. With the rocker covers off the valves and rockers are spotless and seems to be working as expected. There's nothing I can see to indicate leaking heads but the cranking speed makes me wonder about compression.
It now has me baffled and I'd be really grateful for any suggestions for things to check next, if anyone could be kind enough to have any ideas. Thanks.