OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Question On Scott Bonnar Cylinder Mowers Rover 45 Maximum Height Modification?

Hi Deejay,

Thanks for all the info,

I have mixed up the sizing and my mower is a 17" model and not 20" as I originally posted. The Mower is currently off being sharpened so I will check other details when I pick it up. Having dismantled the tank and carburettor the inside of the tank is pretty clean but the diaphragm is definitely the worse for wear so your comments about ethanol are helpful. The replacement diapragm will run on 95 Octane. Are there any other carby components I should replace that might also have been ethanol affected?

I will see how I get on with the height adjustment. I have welded a small plate to the front roller pivot arm but this will be the only modification required and easy to return to original condition at a later time. I certainly don't intend to change the slot in the chassis or any of the adjusting arm mechanism. If I can position the second hole correctly the minimum cutting height for this new hole will hopefully overlap with the maximum cutting height for the original hole. I will try to post a picture once I have tested it for a while and see how the cut is affected.

I expect I may have to mow more often than might be the case with a 6 blade model but I expect the cost of a new cylinder might be somewhat more than I paid for the mower. Certainly having a wider range of cutting height might help as I can take a lighter cut on the first pass.

I was uncertain about whether the clutch needed to be fully engaged so being able to slip the clutch will mean I can cease training for sub 10 second 100 metres.

Thanks Again.