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Hi again lol. Would incorrectly adjusted valve clearance cause a bad start issue. It starts instantly when cold. Once warm it can be a pig. 2009 550. Cheers
 

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If the lash is off, the valves may not be closing all the way. That will cause a hard start.
 

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Anyone know the settings for a 09 550
Adjust cold
Intake .09-.13mm adjust closer to .13mm
Exhaust .16-.20mm adjust in the middle

Hard starting hot is common more related to the fuel tank overheating and the venting.
 
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