One of the most important things I carry is the factory service manual for my vehicle. It is far better than Chilton or Haynes. They are not cheap, my set cost $80
Lawnmower Manual | Haynes Publishing
Haynes Workshop Manuals | Halfords UK
Lawnmower Manual (Haynes home & garden): Amazon.co.uk: Andrew Shanks, Martyn Randall: 9781859603376: Books
Lawnmower Manual (Haynes home & garden): Amazon.co.uk: Andrew Shanks, Martyn Randall: 9781859603376: Books
Owner's Manuals | Honda Lawn Mowers
Lawnmower Manual | Haynes Publishing
British Lawnmower Museum
ProSeries Walk-Behind Lawn Mower Service Repair Manual | Haynes Publishing
Nostalgia: The British Lawnmower Museum Part Two - Southport Visiter