Fig. Fig. 1 Typical evaporative canister mounting and hose attachments
Fig. Fig. 2 On non-maintenance free batteries, the level can be checked through the case on translucent batteries; the cell caps must be removed on other models
Fig. Fig. 3 Check the specific gravity of the battery's electrolyte with a hydrometer
Fig. Fig. 4 A typical sealed (maintenance-free) battery with a built-in hydrometer-NOTE that the hydrometer eye may vary between battery manufacturers; always refer to the battery's label
Fuel vapor emitted through the fuel vapor valve and carburetor bowl vent is stored in a carbon filled canister. There is no scheduled maintenance for the canister other than checking the hose connections periodically. Replace the canister and/or hoses if they are damaged or cracked.