TartanMac Posted May 9, 2019 Share Posted May 9, 2019 Just wondering if by any chance anyone knows what way round this cam goes in this old 1.20 engine. I stripped the engine and found internally the only thing wrong with it was castor. I was stripping it and before I took the cam out I set it to the dots in the Pic and then drew where the cam lobe was in relation to the dots. Then stupidly tipped the engine over and it fell out I thought it was stuck in there its the only part that wasn't. In the Pic it shows the 2 sides of the cam one the centre of the shaft is hollowed out and one it is solid. The one that is hollowed out I noticed after cleaning there is a dot is that to face the case or the small cover? Would really appreciate it if anyone could help. I have the manual but there is no mention of timing and could not find anything on the net. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted May 10, 2019 Share Posted May 10, 2019 If there's a timing dot it will face outwards so that you can see it when it is in position. Quote Link to comment Share on other sites More sharing options...
cymaz Posted May 10, 2019 Share Posted May 10, 2019 I had several os 4 strokes over the years. All had the same timing IIRC HERE is a good starting point. Edited By cymaz on 10/05/2019 06:09:53 Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted May 10, 2019 Share Posted May 10, 2019 the soild eng goes into the far end and the timing will be at 2:30 when the piston is TDC. Align the mark on the prop driver and set at that. Will be ok. turn the engine over and check before starting. Quote Link to comment Share on other sites More sharing options...
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