starter motor/ solenoid problems

[aedgar0485]

hi, i was wondering if anyone has the expertise to help me, i volunteer for a local search and rescue organisation and one of our ribs runs twin yamaha f100 engines. recently one of the starters motors burnt out and so we replaced it. however it doesnt turn over at all. the other engine works fine, as does the tilt and trim on both engines. there is power coming into the engine tested with a voltmeter and we have also started the engine with the pull cord and it works fine that way, im wondering if there is something simple im over looking, the 4 fuses in the engine are also fine.

many thanks in advance

alan

[boats.net]

Test starter solenoid to see if have 12 at brown wire when key switch is start position.