Been a while, hows everybody doing?......My 03 Yamaha F90TLRB has shook when first started/idled for years and then smooths out as it warms up but lately it seems to be worse ( shaking the whole boat (light Jonboat) while on the trailer and I can hear a loud tick about every half second @ 800rpm through the exhaust I haven't noticed before. I'm thinking it's a valve problem ? All advice is apprciated