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9/11/14 Got the solenoid working https://www.youtube.com/watch?v=Un0HZwI8pwg&list=UUL8gj_06zIsMRLY-U6zQItA This engine is called EGG Engine, which stands for Electronic Guided Governor which is a 4 cycle hit and miss, water cooled engine and is based on my own design. The bore and stroke for...

Hello all I am building a small .75” Bore x.75” stroke 4 cycle hit and miss engine. The Governor will be electronic on this engine. Meaning once RPM reaches ~2000 I will leave the exhaust open until RMP drops to XX or is better to keep the exhaust opened for SS seconds? So I need...

Electronically Guided Governor Engine Ok the name is little misleading thinking what the hell is an EGG engine. Good marketing strategy, but now that you are here. The other day I was cleaning my tool box and came across this little fellow. Its a small 5-volt push solenoid. I suddenly decided to...

Hello all, Vertical-One 1" bore x 1.5" stroke Flywheel, 5.5" cast iron Piston: Cast iron with cast iron ring Cylinder: Steel Ignition: CDI with Hall Sensor Timing: Ignition: 5 degree BTDC EO: 40 degree BBDC EC: 15 degree ATDC IO: 10 degree BTDC IC: 5 degree ABDC...

Hello all, This is the engine I am working on. It is my own design with 5.5" flywheel and 1" bore x 1.5" stroke. http://cdn.homemodelenginemachinist.com/attachments/f31/59459d1357071718-my-single-cylinder-engine-002f.jpg As I was tuning the engine, yet another disaster stroked. This time...

Hello all Got a problems with CAM and tappet and not sure where the problem is As you can see in the picture, this is how I have it setup. Initially before starting the engine for the first time, everything was moving smoothly and CAMS were pushing down the valves just fine and smoothly. When I...

Hello all, I built this engine and trying to start it for the first time. I noticed as the engine wants to start the flywheel become loose. I am holding the flywheel in placed with 4 6-32 setscrews. The flywheel diameter is 5.5”. Any suggestion as how to fix this without too much modification...

Hello all, Just finished my engine. As you can see in the picture, the fuel line is well below carburetor. Do you think this will be an issue? Should I raise the tank so the fuel line be level with the center of carburetor...

Hello all I am planning to use a RC carburator for my new engine that I am almost done with. The engine is 4 cycle, 1” bore and 1.5” stroke with compression radio 6:1 What size carburetor is best with the above configuration and how well RC carburetor works with gas or Coleman fuel? Do you...

Hello All, This is a new 4 cycle 1” bore x 1.5” stroke with 5.5” cast Iron flywheel. I'm building this engine from scratch and started this on Feb and worked on it part time from time to time. I almost done like 95% with all the parts so here is a sneak preview.

Hello all, I am building a 4 cycle engine that I want to use timing pulley instead of spur gear. I already have these 2 pulleys that I'm planning to use Crank https://sdp-si.com/eStore/PartDetail.asp?Opener=Group&PartID=59051&GroupID=217 CAM...

Hello all, Today I just made a piston for my new engine and as you can see from the picture, the piston pin is about .0625 off center. Now wondering how this will affect the operation? Do I need to make a new piston or still operational? The engine is single cylinder 4 cycle slow running engine...

Hello all, Yet another CAM question I want to make a CAM that has Duration of 195 crank degree with lift of 0.1" The blank diameter I’m using is 0.5” I’m planning to make the CAM on the lathe using offset turning. So my question is how much of offcenter on the CAM fixture I need? What is the...

Hello all I'm designing a 4 cycle 1” bore x 1.5” stroke single cylinder engine, with compression ratio of 1:6 I need to make the cams for intake and exhaust. The engine suppose to be a slow running no more that 1800 RPM at max with no hit & miss feature. The CAMS are directly on top of the...

Hello all, I'm designing a 4 cycle single cylinder slow running engine with 1" bore X 1.5" stroke . Planning to make a ringless piston out of cast iron and for sleeve, I'm using A513 type 5 steel tube DOM. Since the sleeve will NOT be tapered smaller at the top, is it going to have compression...

Hello all, When machining a 45 degree valve seat, do you need to set the cross feed at 45 degree angle or 22.5? Thanks Borna

Hello all, Building a single cylinder 4 cycle engine. I want to know if I install the spark plug on the side of the head Vs on the top of the head makes a difference? If is on top, the spark will happen directly in the combustion chamber but if the spark plug is installed on the side will not...

Hello all, Is 12L14 a good material for valve cage? Thanks Borna

Hello all, I’m planning to build a vertical 4 cycle single cylinder slow running engine (500 – 1200 RPM) with usable power. This is what I came up with. Would you please let me know what I have so far gives me the result I want? 1" Bore x 1.5" Stroke Piston length: 1" Piston Center pin: 0.5"...

Hello all When designing an engine, how much of piston skirt can go below bore at BDC? Is there a disadvantage when piston skirt comes out of bore about 1/8” to ¼”? Assuming the stroke is 1.5”, piston length is 1.125” Thanks Borna