collective itch Posted October 23, 2013 Share Posted October 23, 2013 After weeks of cleaning, waiting on parts etc, finally got my fg marder out today. It was last used in 2006, and has been in storage. Back then I always had issues with it, but know more about them now. One thing that happened today, which I remember happening back in 2006 is the plastic spur got chewed up, still ran, but seems as if the plastic gear wobbles on the alloy gear holder. Drive shock rubbers are in good condition. What's the best way to make spurs last longer? What should I check? Quote Link to comment Share on other sites More sharing options...
atom3624 Posted October 23, 2013 Share Posted October 23, 2013 1. All screws - tight. 2. Bearings - none have collapsed / seized. 3. Gear holder - straight. 4. Pinion / spur alignment OK. 5. Clutch bell doesn't move in / out too much. 6. Layshaft - in correct position and doesn't move too much. 7. Back to screws, check the motor doesn't move. Al. Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted October 24, 2013 Share Posted October 24, 2013 1) Replace spur gear with one piece metal spur gear Quote Link to comment Share on other sites More sharing options...
goldman Posted October 24, 2013 Share Posted October 24, 2013 Blackbone Gears Ebay. Goldman Quote Link to comment Share on other sites More sharing options...
collective itch Posted October 24, 2013 Author Share Posted October 24, 2013 1. All screws - tight. 2. Bearings - none have collapsed / seized. 3. Gear holder - straight. 4. Pinion / spur alignment OK. 5. Clutch bell doesn't move in / out too much. 6. Layshaft - in correct position and doesn't move too much. 7. Back to screws, check the motor doesn't move. Al. will try to check all of this, think some bearings might be knackered, the pinion gear was really hot. 1) Replace spur gear with one piece metal spur gear Blackbone Gears Ebay. Goldman was thinkking of this route, would i not be likely to damage something else in the geartrain though? Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted October 24, 2013 Share Posted October 24, 2013 Not if all your bearings are OK. I ran all mine with metal spurs and never had an issue 1 Quote Link to comment Share on other sites More sharing options...
goldman Posted October 24, 2013 Share Posted October 24, 2013 will try to check all of this, think some bearings might be knackered, the pinion gear was really hot. was thinkking of this route, would i not be likely to damage something else in the geartrain though? Hi well I have them on & there are a few on here using them,no probs,its a bit like how long is a bit of string I think,they are well worth putting on myself. Goldman 1 Quote Link to comment Share on other sites More sharing options...
atom3624 Posted October 24, 2013 Share Posted October 24, 2013 Careful if you're replacing plastic gears with metal. You can use an ALLOY pinion with a PLASTIC or DELRIN spur - or alloy. If you go to a STEEL PINION, you are recommended to use a STEEL SPUR. Al. 1 Quote Link to comment Share on other sites More sharing options...
carsonkev Posted October 24, 2013 Share Posted October 24, 2013 Just replace both gears with steel ones I had the same on my carson attack fitted with fg plastic gears when I put a tuned pipe on and a 29cc kit on it would chew gears up in no time my record was a brand new set of fg gears lasted less than a min There's some on eBay for around Quote Link to comment Share on other sites More sharing options...
goldman Posted October 24, 2013 Share Posted October 24, 2013 (edited) Yes that's the ones,& they have all different ratios,put them on & forget them. The guy is really helpful,just ask him if your not sure what you need. Goldman Edited October 24, 2013 by goldman Quote Link to comment Share on other sites More sharing options...
atom3624 Posted October 24, 2013 Share Posted October 24, 2013 If you're going for the (excellent) Blackbone gears, check where your shaft 'flats' are. Tuning gear from FG has flats at 90 degrees, standard at 180 degrees - opposed. Blackbone gears are the opposed flats type. I asked him if he made any for tuning gears or had any plans, and was totally ignored - not very pleasant from a supposedly serious supplier!! Al. Quote Link to comment Share on other sites More sharing options...
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