these are terrible for bonnets sticking,check the cable has not came off your orange release lever,have had these broken where the nipple on the cable locates,I think if you crawl under front of motor and look up you can see release leverbut may be tricky to release,if your cable is ok here have someone push and pull the bonnet while you pull the the cable,once open give linkage a good lube,good luck
wickham
July 2010