I TOWARD i v v v S v 71 VENT HOLE INNER TUBE Fig 66 Filling Tool with Oil 3 Start engine If engine is cold allow to run for 2 to 3 minutes The automatic choke must be fully open 4 Accelerate the engine slowly until the oil level in Tool J 7825 just reaches the 1 4 mark Allow engine speed to stabilize and note tachometer reading Decelerate engine 5 If the tachometer reading is at or below the following the paper air cleaner element is restricted beyond the allowable limit and should be replaced Engine Minimum Allowable RPM 1 4 Hs0 95 H P 2600 R P M 110 H P 2600 R P M 140 H P 1900 R P M Dual Air Cleaner 2400 R P M 6 Remove tachometer and Tool J 7825 from vehicle and push down inner tube until seal is below vent hole to prevent oil loss Tool J 7825 Tool J 7825 fig 65 is shipped dry and must be filled with the red gauge oil specific gravity 826 provided Filling Tool Pull the knurled inner tube completely out of the gauge and add oil to the reservoir until the oil level is between the two FILL lines Figure 66 Refill whenever the level falls below the lower FILL line Storing Tool When the gauge is not in use fully depress the inner tube This seals off the oil reservoir from the vent hole to prevent oil loss if the gauge is tipped OIL BATH PRECLEANER Maintenance 1 Loosen and remove wing stud 2 Remove air cleaner from the vehicle and then remove the filter element assembly