Jonathan M Posted June 17, 2019 Share Posted June 17, 2019 I've just been given a used OS MAX 46 FX, don't know how old but it looks pretty clean and feels nice and bouncy turning over by hand. What are they like? Quote Link to comment Share on other sites More sharing options...
Nigel R Posted June 17, 2019 Share Posted June 17, 2019 Not used the FX series. I have run the predecessor SF in 40 and 60 size quite a bit. Very nice engines. Still have some, although currently not in use. I'm sure someone will mention the OS cylinder peeling problem soon. Never experienced it myself. Quote Link to comment Share on other sites More sharing options...
Fatscoleymo Posted June 17, 2019 Share Posted June 17, 2019 Powerful engines, but they suffered from the coating on the liner 'de-laminating'. Worth pulling it apart to check. Fats Quote Link to comment Share on other sites More sharing options...
Jonathan M Posted June 17, 2019 Author Share Posted June 17, 2019 Thx. I'll check the plug and run it up on the bench. If it struggles I'll open it up for a look-see. Assume Just Engines can supply liner if needed..? Quote Link to comment Share on other sites More sharing options...
Jon H Posted June 17, 2019 Share Posted June 17, 2019 You can use the ASP piston and liner in those i believe. They tend to last longer than the supposedly better quality os ones. Quote Link to comment Share on other sites More sharing options...
will -0 Posted June 17, 2019 Share Posted June 17, 2019 Personally, if it looks clean and you can't see an obvious problem through the exhaust port, i'd run it first and only take apart if there's an actual problem. Quote Link to comment Share on other sites More sharing options...
Jon H Posted June 17, 2019 Share Posted June 17, 2019 Posted by will -0 on 17/06/2019 10:46:49: Personally, if it looks clean and you can't see an obvious problem through the exhaust port, i'd run it first and only take apart if there's an actual problem. In general I would inspect first because if there is a problem you risk doing more damage. That said, if the liner and piston are damaged now they are already scrap so i guess it makes little difference in this case Quote Link to comment Share on other sites More sharing options...
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