1999 Volvo Penta "WT" Models Workshop Manual, Page 161Get this manual
Installation [] 1Lubricate inside diameter of 3.5 in(8,89 cm) I.Dlower hose with soapy water solutionSlide it all the way onto the exhaust V-pipe
INotel The inside diameter of both the upper and lower hoses has step 1.5 in(3,81 cm) from one endThe stepped end of the hose must face the intermediate pipe when installed2Slide hose onto high-rise elbow until it seats
INotellf hose is not properly positioned, it will not completely engage the high-rise elbow or allow secure attachment
3Place four No68 clamps on upper hoseWith twisting motion, insert intermediate pipe all the way into the upper hosePlace four No64 clamps on lower hoseAlign lower end of pipe with exhaust V-pipe, then slide lower hose up until it's halfway onto the intermediate pipePosition clamps in channels and tighten clamps securely