Yamaha 150 troubleshoot ?

Toula

Cadet
Joined
Oct 9, 2016
Messages
8
Hi, a bit of a puzzler...turn the key ON, the bendix gear on starter engages flywheel but cannot turn it to start the engine. Checked/validated fully charged/new batteries, all connections appear tight/clean. When I put cables direct to starter from battery the engine starts. Then when moving forward I go to trim the engine cuts out. To summarize; when I connect direct battery to starter the engine starts, however cuts out when I use trim/tilt. Then when engine is off, the tilt/ trim works. So am thinking the starter is good, the tilt/ trim is good...from there on I’m stuck on what to check next to fix this. As always appreciate the counsel.
 

mike_i

Ensign
Joined
Jun 28, 2017
Messages
959
Measure the battery voltage with a voltmeter at the battery while cranking the motor. Then measure voltage at the starter while cranking.
 
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