Idle Exhaust System - Yamaha F150B Service Manual

Idle exhaust system

The exhaust gas runs out through the idle exhaust port at idle engine speed.
The labyrinth structure is used to reduce the exhaust noise.
A
Exhaust gas flow
a
Labyrinth structure
Intake and exhaust system
a
A
0
1
2
3
4
5
6
7
8
9
10
A
2-28