I was given a Suzuki DT 60 when I bought a pontoon boat, several parts were in a box, I have put all back together and I actually started, but missing the intake cover and and silencer, looks like two parts plus a gasket. Is this a must and if so any clue where i can buy one. It must have been missing for awhile because the vacuum line going to it, is plugged off. My guess they had removed for addjustments and put in the engine cover and engine cover fell overboard because I am in need of one of them also.....THANKS