John Minchell Posted January 9, 2022 Share Posted January 9, 2022 I have a NIB Merco 61 spark ignition petrol motor and would like to build a vintage model for it. Just for floating around on calm evenings of course. Had thought of a KK Falcon but they are 10a penny. I have a few old timer gasser plans from the US, but really need to have an idea of the size / weight that the engine will cope with whilst leaving a bit extra for the odd windy day or for getting out of trouble. Any help appreciated. John M Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted January 10, 2022 Share Posted January 10, 2022 I have Never heard of a .61 Merco spark, lets have some photos of it,,, pretty please,,, Quote Link to comment Share on other sites More sharing options...
John Minchell Posted January 10, 2022 Author Share Posted January 10, 2022 Here you go 1 Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted January 10, 2022 Share Posted January 10, 2022 Thanks a work of art,,,,? Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted January 10, 2022 Share Posted January 10, 2022 Brilliant pictures John Have Always been ok with 7.5 - 8lb auw with my .60s but they were glow. Petrol must be pretty close to that. Quote Link to comment Share on other sites More sharing options...
John Minchell Posted January 10, 2022 Author Share Posted January 10, 2022 Yes it's interesting in that it has a micro switch bolted just in front of the exhaust outlet and operated by a cam on the throttle arm so that at low (25% or less) throttle it retards the ignition to stop it being too advanced at tickover and stopping and throwing a prop. Says run it in on a 13x6 prop but can go up to a 16x6. Thanks for the weight guide Denis. John M Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted January 10, 2022 Share Posted January 10, 2022 (edited) My Ben Buckle Majestic major flies nicely on a Laser 62 and handle a reasonable bit of wind, so something around that size should be about right for the Merco. Belair have quite a selection of vintage plan/packs might be worth browsing on there. Edited January 10, 2022 by Frank Skilbeck Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.