1999 Volvo Penta "WT" Models Workshop Manual, Page 291Get this manual
Exhaust Hose and Intermediate Pipe Replacement Removal
1Loosen eight clamps that attach the upper and lower exhaust hoses, and slide clamps down onto exhaust V-pipe
2Lubricate inside of lower hose with soapy water solution, and push lower hose down onto exhaust V-pipe3Twist intermediate pipe out of upper hoseLubricate
inside of upper hose with soapy water solution for ease of
removal
4Slide upper hose off high-rise elbowSlide lower hose off exhaust V-pipe
Installation
1Lubricate inside diameter of 3.5 in(8,89 em) I.Dlower hose with soapy water solutionSlide it all the way onto the exhaust V-pipe[] 2On the inside of the in(10,16 em) 1.0upper hose, there is circular rib 1.5 in(3,81 em) from one endThe ribbed end of the hose must face the intermediate pipe (rearward) when it's installedSlide hose onto high-rise elbow until it seatsNOTE: If hose is not properly positioned, it will not completely engage the high-rise elbow or allow secure attachment[] 3With twisting motion, insert intermediate pipe all the way into the upper hoseSlide the lower hose up until it's halfway onto the intermediate pipe