Owners of the Hoglet V Twin

So thankfully I have now finished my first ever IC engine which is the V Twin Hoglet. Fuel tanks on, base hides the electronics and she does eventually start with the Kickstarter!

My one question is, does anyone else get a slight bit of fuel/oil seep past the O rings to cover the flywheel? Every time mine runs it sprays black stuff and I have to clean the flywheel and surrounding areas. I’m just wondering if this is normal or if my O rings aren’t a tight enough fit

If you don't get any answers on this forum you can also try the HMEM ( home model engine machinists ) forum there are quite a few threads about the hoglet on there .

I've not seen it mentioned by other users.

Most of my open crank IC engines spit a bit of muck out of the end of the cylinder and many of the full size ones had drain holes in the bottom of the bed casting to allow the oil that gathered to be cleaned out. You also get a bit of oil/grease flung out from the big end bearing.

MEM forum also has quite afew members who have completed their Hoglets and the odd Open Six which it is related to.

If you don't get some small amount of oil flying around you may well have more problems with a lack of lubrication.

Ian S C

Just musing, could it be the o-rings are being rapidly degraded by the oil/fuel? Are they of a material that will be resistant? The black gank could be rubber...

As Ian sc says - better to have a bit too much oil than not enough !

I see you have found the answers you seek on the hmem site and thanks to Jason with his video of his hit and miss engine - very nicely made i may add !

There are always some non carbon deposits when first running an engine be they from the cast iron liner, ali piston or the rings either iron or O Ring.

For an O ring the bore is best lapped to get it as smooth as possible but even then there will be some initial wear on the ring as it beds in, if the bore has just been left straight off the tool or honed then there will be more o ring wear and this could mean the rings need changing a few times as they become flat spotted.

You also find that when trying to get an engine to run for the first time you are likely to flood it on a few occasions and the excess fuel will was any muck out the bottom of the cylinder. As thind bed in the oil content can be reduced and there should be less metal and rubber being worn off the parts as they bed in.

Provided the rings are Vitron as per drawing they should not be attacked by pump fuel or Colmans.

Neil also asked on another forum and I posted this video of another open crank hit & miss engine where you can see a small pool of black liquid sitting in the well below the crank.

You should post Some more videos of your engines on this forum  Jason   - it would make a welcome distraction to some of the things going on here !

Edited By XD 351 on 14/07/2018 11:03:58

They have all been posted at some time, just politics and punctuation seem to draw more interest