Guest Darren Masters Posted September 17, 2011 Share Posted September 17, 2011 How often are you all replacing these? I have a Rotax 447 and I am replacing the plugs after what I assume was 30 or so hrs. Probably don't need to as the plugs look ok but I don't know when the owner before did them. Michael Coates, you may know mate, what is the recommended replacement by Rotax? Link to comment Share on other sites More sharing options...
robinsm Posted October 24, 2011 Share Posted October 24, 2011 every 25 hrs as per book Link to comment Share on other sites More sharing options...
Guest Michael Coates Posted October 25, 2011 Share Posted October 25, 2011 Agreed... 25 hours sounds good, especially if the engine is inverted. Link to comment Share on other sites More sharing options...
Guest Darren Masters Posted October 25, 2011 Share Posted October 25, 2011 Not inverted but I have been advised 25hrs so that is what I shall do :) Link to comment Share on other sites More sharing options...
David Isaac Posted October 25, 2011 Share Posted October 25, 2011 Not inverted .... Well that depends, we don't know how you fly way down there in kiwi land do we ... LOL Link to comment Share on other sites More sharing options...
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