motor problems

[richard laperuta]

Good Morning, I Own A 50 Hp 4 Cylinder 4 Stroke Yamaha T50tlrb Attached To My 20 Foot Pontoon. The Engine Is Very Hard To Start, Then When Put Into Foward Or Reverse...stalls. It Also Will Not Rev Past 4000 Rpms. Then On The Other Hand Sometimes It Does Start Normally And Run Ok For A Little While. I Put In 10 Micron Filter And Checked Plugs. This Is A Carb Motor Not Fuel Injector. Thanks Richard Ps Some People Are Telling Me The Carbs Are Full Of Hose Debris Because Of The Ethenol In The Gas. ?????????

[boats.net]

Probably need to remove and clean carbs and resynchronize carbs.