[Tiara Open] What maintenance Items should I keep on the boat

[Uhehner]

I love my Tiara  36' Open . About to take our first trip and was wondering if anyone had a list of items that I should have on the boat in case of breakdown. I realize i can't take every part with us but I just do not want to be stranded and have to call for a tow if i don;t have to  
My initial list is  

• Two impellers 
  
• wooden drain plugs 
  
• Oil filters and fuel separators 
  
• Jumper cables 
  
• Tool set 
  
• Flashlight 
  
• I have all the flares and safety flags  
  
• Hoses??
  

What am I forgetting ???  we leave this Wednesday  . Thank you in advance for your input

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I carry an engine alternator / water pump belt and one of the engine relays.
Capt. George