Glenno69

Hi trebor I can also recommend them and the service from Gavin, I have fitted them in a Laser 50, OS 45 FSR, OS 40 FSR and have set waiting to go into my Laser 61. It is possible to track down genuine spares, depending on the engine of course. Glenn

No it's not oil, and the hone marks would be the original finish. The engine was mounted inverted in a F4c/FAI competition Sopwith Camel, so probably did very little work. However it did sit unused for quite a while at TDC. the only explanation I can come up with, is that due to running caster, not flushing afterwards and then leaving it for a long time, is that the top ring may have stuck to the liner. No problem, It's an easy fix, just wanted to share the info and get your opinion. After all to me it's an interesting and enjoyable part of the hobby as I also play with and race vintage motorbikes, so I can relate the information from one to the other. Cheers Glenn

Hi Jon, Success, I managed to remove the Rocker pivot retaining stud, I heated the head, not with my micro torch, but with my soldering iron resting on the head adjacent the stud, as I was concerned about damaging the rocker spacers. I was then able to grip the stud with needle nose pliers, and while the head was still hot, push out the pin. I also managed to get some pics of the liner, Taken from the front of the engine, ie 12 o'clock. you can see the damage at 4, 6 and 8 o'clock And in close up, You can see that it seems to correspond to where the top ring stops, at the top of the bore, Incidentally the engine may have sat for possibly 8 to 10 years since its last flight! Glenn

Jon, Will give it a go and report back. Thanks for your help and support you give. Cheers Glenn

G'day Jon, Thanks for the prompt reply, I guessed that was the case, yes the pillar nut came off the stud. I did try using a thread lock to glue on the nut to the stud and warming the head with no luck, as you say I may have to try again, or get creative! Will try a little oil on the rockers to lubricate the O rings. Will try and get a photo of the liner, yes I intended to replace it and the rings, No problem though as the price was right. Have been making a shopping list, but via the forum I knew about your move, so have been holding off. Glenn

G'day, From Perth Australia. This is my first post to this forum, though I have been watching and reading and learning a lot. I was recently given by a very good friend who quit modelling some years ago, now that he is flying his full size Flitzer Biplane, A Laser 100 engine and his scratch built Sopwith Camel. The engine was seriously gummed up and grotty, ( he was using caster ) so I stripped it down to replace the bearings and De-carbon the valves etc. I am lucky to own several of the early engines such as 50, 61, 75, 90 and have rebuilt 2 or 3 of them with no problems. As well as a so far unused 80, & 150. My questions are, I wish to remove the Rocker arm pivot pin to remove the rockers and the valves, there is a threaded screw between the rockers, which has a deep nut attached to take the rocker box retaining screw. Does this retain the pivot pin? and if so, how does one remove it, as it has no head? Either side of the Rocker arms are a Teflon spacer one side and a rubber "O" ring the other, Is this correct? it seems to impart quite a lot of friction to the movement of the rockers, My early engines have Teflon spacers on both sides which allows them to move very freely with slight endplay side to side. The Cylinder liner has a couple of sections of plating missing at the very top, When stripped, the engine was at TDC, so am thinking that the rings may have been stuck, Is this possible? I found no sign of the material when cleaning it though. Hope I haven't been too long winded, and look forward to being able to return another beautiful Laser to the air Many thanks Glenn