TM 5-3805-261-20ENGINE TROUBLESHOOTING PROCEDURES. (cont.)6-3.Engine STE/ICE Tests. (cont.)a.TEST 10. ENGINE RPM (AVERAGE)(cont.)3.Install pulse tachometer and connect cable (Figure 6-6).Figure 6-6.4.Perform test using procedure TEST 10 as instructed in TM 9-4910-571-12 & P.5.At low idle engine should run between 960-980 rpm. At high idle engine should run between 2310-2370rpm.6.Return vehicle to its original condition.6-8
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