Homelite with starter
06-09-2014 | 06:50 PM
#1
Homelite with starter
I aquired a couple Homelite UT20683 trimmers with an onboard electric starter and battery pack.They are 25cc with clutches.I found out that the battery pack is 4.8volt and I took one apart to see what type batteries are in it and there are what looks to be four sub C Nicad batteries,to make the 4.8 volts.I haven't tried to charge them with a charger that came with one of the trimmers,but I suspect that they are bad after sitting for a couple years,in the cold and heat.I'm going to take the plastic shrouds off one of them and see what's under there and will post pics of the engine.
In looking at an engine parts diagram I saw what's called a compression release valve on the cylinder.What's the purpose of that ?Is it to make the engine easier to start ? In an RCU search I found a thread where someone else had these also,but there was no mention of one being converted to an airplane engine,using the electric starter.Has anyone used one and has not posted the results on here ?
I think it would be neat to be able to start the engine with maybe the starter button on the plane somewhere or start it using a servo connected to a switch.
I found a post where someone was converting one into an r/c boat engine and relocated the starter motor up and to the side instead of the engine bottom to get the engine lower in the boat hull.Pics below.
http://www.ereplacementparts.com/hom...99_200250.html
In looking at an engine parts diagram I saw what's called a compression release valve on the cylinder.What's the purpose of that ?Is it to make the engine easier to start ? In an RCU search I found a thread where someone else had these also,but there was no mention of one being converted to an airplane engine,using the electric starter.Has anyone used one and has not posted the results on here ?
I think it would be neat to be able to start the engine with maybe the starter button on the plane somewhere or start it using a servo connected to a switch.
I found a post where someone was converting one into an r/c boat engine and relocated the starter motor up and to the side instead of the engine bottom to get the engine lower in the boat hull.Pics below.
http://www.ereplacementparts.com/hom...99_200250.html
Last edited by Tidnab; 06-09-2014 at 07:06 PM.
06-10-2014 | 04:16 PM
#2
My guess the compression release is needed so the small electric starter can turn the engine over. A onboard starter would be neat for boats cars....ect. On a airplane it may be too heavy. Hand-held electric starters work good.
07-13-2014 | 09:53 AM
#3
Compression Release Valve
Got this engine cleaned up pretty good,but what should I do with the compression release on the cylinder. Should I just leave it alone ,as it only releases when pushed in or should I take it out and plug the hole with a short bolt ? If you could have someone push it when flip starting the engine it might start easier.
07-13-2014 | 11:30 AM
#4
My Feedback: (6)
A compression release is not wanted nor needed for hand starting; only to help the little electric starter to turn over the engine as mentioned. If you are not going to use the electric starter, I would take the compression release out and plug the hole with a short bolt.
AV8TOR
AV8TOR
