Idle COMPENSATOR
The idle compensator is a thermostatic valve which opens to allow air directly to the intake manifold to compensate for the overly rich air/fuel ratio present during high idle temperature. Two idle compensators, having different opening temperatures, are used on 210 and 310 models. On 510 and Pickup models, only one idle compensator is used. On 210 and 310 models, first compensator opens at 140-158°F (60-70°C) and second compensator opens at 158-176°F (70-80°C). On 510 and Pickup models, idle compensator opens at 127°F (53°C).
NOTE:
On 510 and Pickup models, idle compensator is mounted on carburetor, not in air cleaner housing as on 210 and 310 models.