1999 Volvo Penta "WT" Models Workshop Manual, Page 15Get this manual

1999 Volvo Penta "WT" Models Workshop Manual, Page 15

Intake Manifold Vacuum Testing _._ Test Procedures
1Install vacuum gauge to good intake manifold source, following the gauge manufacturer's instructionsStart and warm up the engine2Observe the vacuum gauge whiie operating the engine over range of engine speeds

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