OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Question On Scott Bonnar Cylinder Mowers Annoying crunch noise

Hi all, i have a SB 45 17 inch. when i engage i have a loud crunch sound for a split second.I have been chasing this and have renewed the following,new reel bearings,new reel dual sprocket,new real chain,new self align bearing, new corks.All sprockett and shaft keys are firm with no movement at all,clutch halves and inner cone have no cracks or chunks in them and engage/disengage correctly.Reel chain is not loose or overtight.Am at my wits end,any advice is appreciated.

Hi Bruban,

Firstly welcome to the ODK Forums.

This could be a multitude of things that are not quite adjusted correctly. As you are in Adelaide as well I'm more than happy to look at it and diagnose the problem if you like. I have to ask what part of Adelaide are you in ?

Cheers,
BB.

PS. I have moved this thread to the Scott Bonnar area as it was listed under "Ride Ons" which clearly it isn't, well I hope it isn't ?

Hi Bonnar Bloke,

Thanks for your reply, much appreciated. No not a ride on. Your offer to take a look is a very kind gesture. I live at Richmond down by the airport,off Marion Road. If this is to far for you I understand. If you want to look just tell me when you want to do it. I am retired so around most times.

Thanks for your offer,look forward to hearing back from you regarding this annoying problem that i cant solve.

Hi Bruban,

Well I ventured down to Richmond to see if we could get to the bottom of the crunching noise on this 45 and ended up having a fantastic day out at Bruan's residence.

A fantastic spacious 1960's style rear lawn surrounded by wide paths that's perfect material to use both a Model 45 on, along with a Model 38 Edger.

This is what I love about the ODK Forums opposed to the Facebook pages that are full of self centred abusing know it alls. This place encourages friendships.

ODK now attracts a better class of folk and this is so evident with many of the great people that are here and are really happy to give and give well and and not just take like it appears to be the case on many of the Social Media sites.

Bruban, please keep on doing what you are doing as you make the world a much nicer place to live in.

Cheers,
BB.

PS. For all others reading this short thread the noise encountered was rather normal on a 45 but was slightly enhanced due to a slight amount of play within the woodruff key area of the Primary Clutch and PTO transfer Shaft. Over time the recess in the shaft widens while the key itself wears down one side. Replacement of the shaft with a new key should quieten it down a bit more. Also we loosened the chains as they were all a tad on the tight side which is counter productive to the well-being of the mechanicals. It was also noted that this mower really should have a new clutch body fitted as it wasn't running as true as it should be. After this work is performed it should give many years of trouble free mowing.