Yamaha f150 won’t start

[fishingguru]

Been having some issue with the boat starting. The starter will engage the flywheel but won't spin to start it. I have replaced the batter with a new one (even though the old one tested good), replaced the starter and still have the same problem. I am guessing it is the ignition or the starter relay...which is where my question comes in. On this make and model is the starter relay the same part as the trim/tilt relay? What could I be missing?

[99yam40]

no, the T&T relay does operate the starter.

if the starter jumps up and engages the fly wheel , then you know your ignition switch works

can you turn the motor/ flywheel by hand or is it froze / locked up?

if you cannot turn the motor/ flywheel by hand, DROP THE LOWER UNIT AND TRY IT AGAIN

[TownsendsFJR1300]

The starter relay contacts inside the relay can indeed cause your issues.
Bad contacts doesn't allow for full power to the starter

I had similar issues and tracked it down to the relay.

Below is a pic of the actual relay contacts from inside my failed unit:

[99yam40]

no, the T&T relay does operate the starter.

if the starter jumps up and engages the flywheel , then you know your ignition switch works

can you turn the motor/ flywheel by hand or is it froze / locked up?

if you cannot turn the motor/ flywheel by hand, DROP THE LOWER UNIT AND TRY IT AGAIN

that was suppose to read does not