Howard 300 (circa 1962-1969) An 18″ Rotavator.The engine was a Briggs & Stratton 141, rated at 4hp.Slasher 701, OMP Manual, Version 1.1 - 7 - Mounting Your Slasher to the Tractor Before mounting the slasher to the tractor, ensure that the stabiliser bars and adjustable top link are fitted to the tractor. Full PDF instructions and diagrams to view online or download and print, covering the different engine types found in these Howard rotavators. See more ideas about howard, hoe, rotary.Howard 300 and 350 service repair manual for all workshop servicing of the Howard rotavator engines. Explore Tractor manuals downunder's board 'Howard & other rotary hoe manuals to download', followed by 312 people on Pinterest. At the start of each section, there is a list of ordinary workshop tools that. HOWARD GElVl service bulletins after bulletin H.63, should be kept with this manual, and a note added to the index of each section affected, so that an up to date record of modifications is kept. Use original Falcon quality parts for the best and most reliable performance. Need to Order Parts? Get original parts and ensure you do not compromise your warranty.