Vacuum Hose Routing

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Vacuum hoses on the 1200 follow a simple layout.

Overview

1. VACUUM ADVANCE

Vacuum Advance

The A12 will run good with the vacuum advance disconnected, but will run smoother and get better fuel economy with it working.

Connect a hose from the distributor to the port connection directly above the idle mixture screw.

Vacuum advance in all models uses a hose from the 'port' on the carburetor to the Distributor.

For more information, see Vacuum Advance

= Carbon Canister

For late model 1200s, Tee into this line and connect a hose to the Charcoal Canister "VC" line. The canister is for the Fuel Tank vent. Since these fuel tanks are sealed, it needs to vent somewhere.

just three connections: 1. Fuel tank vent line (connection by itself) 2. PURGE - to intake manifold (bottom connector) 3. Vacuum Control (top connector) - to vacuum advance hose

USA

USA models have more emission controls, so a couple extra lines are used.

See:

• Emission Controls#Throttle Opener
• Emission Controls#Temperature Controlled Air Cleaner
• Fume Control (for the Flow Guide Valve details)
• TCVAS