Dan Brannon Posted December 2, 2010 Share Posted December 2, 2010 This is my first post on the forum although I've been looking around for a while. I'm new to this hobby and have finally got around to buying a WOT Trainer & Irvine 46 engine to power it. This is probably a silly question but on getting the engine out of the box it is very tight turning over the crank by hand, it seems to stick and feels like its binding when the piston is at the top of its travel, it is smooth around the rest of the crank travel. This was with no glow plug fitted. Never having played with an IC engine I'm not sure what is normal Do you think this a problem or is just due to it being a new engine..? Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted December 2, 2010 Share Posted December 2, 2010 Its normal- especially for an ABC ( ally / brass/ chrome ) engine. It will loosen up with fuel, heat, and use.Welcome aboard by the way...and remember there are no silly questions! Edited By Tim Mackey - Administrator on 02/12/2010 18:44:19 Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted December 2, 2010 Share Posted December 2, 2010 The bore on a 2 stroke is marginally tapered so the tightness is at the top of the stroke when the piston is at the narrowest part of the bore ,thats why it still tight even though the glow is not fitted so there is no compression.I did send one new engine back.IT was so tight even though I thought the prop was good and tight it wasnt .All the sqeeking and awful noises when I was trying to start it were the prop going round without the engine actually turning.Id even had the engine running before. Quote Link to comment Share on other sites More sharing options...
Dan Brannon Posted December 2, 2010 Author Share Posted December 2, 2010 Thank Tim, thats put my mind to rest. I Can get on with enjoying it now. I just need to find a beginner friendly club in Northamptonshire and I'll be sorted. Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted December 2, 2010 Share Posted December 2, 2010 Good luck in finding a club Dan,hope it goes well Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted December 2, 2010 Share Posted December 2, 2010 wellcome from me dan.........the engine is normal...once it's had a run or two...it will be fine....have fun...... ken anderson ne....1. Quote Link to comment Share on other sites More sharing options...
Dan Brannon Posted December 2, 2010 Author Share Posted December 2, 2010 Thanks everyone, One thing I'm looking forward to with this hobby (apart from the flying) is learning about all this new stuff. My Transmitter looks like something from the starship enterprise.... Quote Link to comment Share on other sites More sharing options...
Stephen Grigg Posted December 2, 2010 Share Posted December 2, 2010 Ive had my transmitter nearly a year and Im still learning things about it,have trouble getting radio 1 as well Quote Link to comment Share on other sites More sharing options...
IanN Posted December 2, 2010 Share Posted December 2, 2010 Dan, the Irv 46 is a fine engine, and will also serve well for follow on sports and aerobatic models beyond your initial trainer Re the tightness when new that is, as has already been said above, perfectly normal. To demonstrate that, if you grip the cylinder in your hand for a few mins you'll probably find that this alone is enough to get it sufficiently warm to noticeably ease the engine up when the piston reaches the top of its travel. Quote Link to comment Share on other sites More sharing options...
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