Yamaha F2.5A Service Manual

Also see for F25A: Service manual Owner's manual Service manual Owner's manual Owner's manual

Contents

69M3E11 1-18123456789Test run1. Start the engine, and then check that thegear shift operates smoothly.2. Check the engine idle speed after theengine has been warmed up.3. Operate at trolling speed.4. Run the outboard motor for one hour at2,000 r/min or at half throttle, then foranother hour at 3,000 r/min or at 3/4throttle.NOTE:The test run is part of the break-in operation.Break-inDuring the test run, perform the break-inoperation in the following three stages.1. One hour a at 2,000 r/min or at approxi-mately half throttle2. One hour b at 3,000 r/min or 3/4 throttleand one minute out of every ten at fullthrottle3. Eight hours c at any speed, however,avoid running at full speed for more thanfive minutesÈ HourAfter test run1. Check for water in the gear oil.2. Check for fuel leakage in the cowling.3. After a test run and while the engine is atidle, flush the cooling water passage withfresh water using the flushing kit.Adjusting the engine idle speedAdjust the idle speed after completing thebreak-in period.With the smallest engine and lowest output,the idle speed tends to rise by the reductionof the engine internal friction due to thebreak-in.1. Warm the engine up for 5 minutes, andthen turn it off.2. Attach the special service tool to thespark plug wire 1.3. Start the engine, and then check theengine idle speed. Adjust if out of specifi-cation.S69J12400 1 2 10Digital tachometer: 90890-06760Engine idle speed:1,800–2,000 r/minPredelivery checks