When you've finished trimming the lawn (with your liquid fuel driven cylinder mower) just take the mower with you to your small lake moored recreation boat for a relaxing aquatic reward.
This mower cuts in a conventional manner, but there is one main difference between it and all other mowers; the actual engine is connected to the cutting blades via an extended drive shaft.
To facilitate its second function, attach the mower to the back of your boat, using the special clips. Now lower the revolving cylinder end into the water and start up the engine. The extended driving shaft ensures that the motor and fuel supply are kept well clear of the water.
Your boat is now powered gently along using the paddling effect of the rotating grass cutting blades, and no need to buy a separate outboard engine, or clean away the sticky sap and left over grass cuttings.-- xenzag, Mar 08 2015 impractical [+]-- Voice, Mar 08 2015 I have a push mower, would this invention work for me too?-- pocmloc, Mar 08 2015 You should certainly try it, that would work wonderfully for everyone else. Make sure you wear your special steel toecapped extra heavy boots for a positive outcome when you go boating.-- 8th of 7, Mar 08 2015 //I have a push mower....// Alas no. It needs an engine.-- xenzag, Mar 08 2015 Diced fish... mmm...-- RayfordSteele, Mar 08 2015 Dual reel mower drive ? One mower with a right helix and one mower with a left helix mounted port and starboard.-- popbottle, Mar 10 2015 Maybe just make the motor easier to remove/swap between the different devices. That way, you could open up a market for other devices that could use a gas-powered engine. (Like, a white-board eraser)-- sophocles, Mar 13 2015 random, halfbakery