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Message: <blockquote data-quote="Topper1" data-source="post: 124776" data-attributes="member: 22814">I have had the same issues on my 430 and both of my 450s. The starter solenoid acts, pulling the spur forward, but fails to engage the starter motor contacts unless the spur gear was meshed into the flywheel gear.  Rather then replacing the starters, my mechanic inserted a 1/16"-1/8" shim on the starter bolts between the starter and its mount. This allowed the solenoid to contact and turn/engage the flywheel. That was 5 or 6 years ago now. Still starts every time with no issues. We check the bolts every service anyway and have had NO issues.  The solenoid contacts should have been thicker to allow starter motor / gear rotation just prior to flywheel meshing. Poor design but good for sales i guess.</blockquote>