Walbro adapter for 40-60 size engines?
07-24-2016, 01:24 PM
#1
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Join Date: Dec 2002
Location: Dokka, NORWAY
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Walbro adapter for 40-60 size engines?
Hi,
I came across a few videos on YouTube today where people had converted their two-stroke glow engines to run on petrol, using a G5 plug and a Walbro carburettor.
I have tried running one of my glow engines on petrol with the G5 plug - with the glow carburettor - and it worked reasonably well except for the fact that the needles were too coarse to fine-tune the mixture. One click either way would make it too rich or too lean, to the point of not being usable for flight.
If I could mount one of the smaller Walbros to the engine, I think it would run beautifully on petrol.
Do you know of anyone who makes adapters that would allow a Walbro to fit on a glow engine around .40-.60 size?
I came across a few videos on YouTube today where people had converted their two-stroke glow engines to run on petrol, using a G5 plug and a Walbro carburettor.
I have tried running one of my glow engines on petrol with the G5 plug - with the glow carburettor - and it worked reasonably well except for the fact that the needles were too coarse to fine-tune the mixture. One click either way would make it too rich or too lean, to the point of not being usable for flight.
If I could mount one of the smaller Walbros to the engine, I think it would run beautifully on petrol.
Do you know of anyone who makes adapters that would allow a Walbro to fit on a glow engine around .40-.60 size?
10-05-2016, 11:21 AM
#2
Senior Member
Originally Posted by sandal
Hi,
I came across a few videos on YouTube today where people had converted their two-stroke glow engines to run on petrol, using a G5 plug and a Walbro carburettor.
I have tried running one of my glow engines on petrol with the G5 plug - with the glow carburettor - and it worked reasonably well except for the fact that the needles were too coarse to fine-tune the mixture. One click either way would make it too rich or too lean, to the point of not being usable for flight.
If I could mount one of the smaller Walbros to the engine, I think it would run beautifully on petrol.
Do you know of anyone who makes adapters that would allow a Walbro to fit on a glow engine around .40-.60 size?
I came across a few videos on YouTube today where people had converted their two-stroke glow engines to run on petrol, using a G5 plug and a Walbro carburettor.
I have tried running one of my glow engines on petrol with the G5 plug - with the glow carburettor - and it worked reasonably well except for the fact that the needles were too coarse to fine-tune the mixture. One click either way would make it too rich or too lean, to the point of not being usable for flight.
If I could mount one of the smaller Walbros to the engine, I think it would run beautifully on petrol.
Do you know of anyone who makes adapters that would allow a Walbro to fit on a glow engine around .40-.60 size?
BCCHI
10-07-2016, 01:04 AM
#3
Senior Member
This is one way around that problem, that I have used.
The carb is mounted to the firewall of the model.
A short stub pipe is inserted into the cylinder head, and a piece of tubing connects the two.
Works really well. Costs nothing.
The carb is mounted to the firewall of the model.
A short stub pipe is inserted into the cylinder head, and a piece of tubing connects the two.
Works really well. Costs nothing.
10-07-2016, 06:05 AM
#4
Originally Posted by bogbeagle
This is one way around that problem, that I have used.
The carb is mounted to the firewall of the model.
A short stub pipe is inserted into the cylinder head, and a piece of tubing connects the two.
Works really well. Costs nothing.
The carb is mounted to the firewall of the model.
A short stub pipe is inserted into the cylinder head, and a piece of tubing connects the two.
Works really well. Costs nothing.
Re the use of gasoline with YS engines, of course the gasoline will destroy the silicone regulator parts of the YS system, but I notice you have defeated that feature with a tubing bypass. Did you remove the silicone parts so the destroyed pieces do not get in the engine? How did you get the pulse for the Walbro? What oil and percentage did you use? Pictures/stats of the engine running? Thanks.
10-07-2016, 06:18 AM
#6
Senior Member
The Walbro pulse comes from the tapping which normally pressurises the fuel tank ... on that dreadful YS pressurised system.
Left the silicone regulator in situ, 'cos I don't use it. The engine uses normal aspiration, with a conventional glow carb mounted on a stub pipe.. a bit like a Laser engine. In my experience, petrol just causes silicone parts to swell up. Anyways, it hasn't proven to be a problem, thus far.
As I recall, I was using something like a 10% petroil mix.
The whole thing was just an experiment; the engine was subsequently re-converted to glow fuel. It did run very well on petrol, though.
Yeah, it would be a bit more tricky with a two-stroke engine, having a forward-mounted carb. Rear-induction types would be more appropriate.
There's a guy at our field who uses those special plugs. Same problem that all the conversions have ... carburation. A Walbro will very likely see you right. Prop clearance might be an issue, unless you are careful.
Left the silicone regulator in situ, 'cos I don't use it. The engine uses normal aspiration, with a conventional glow carb mounted on a stub pipe.. a bit like a Laser engine. In my experience, petrol just causes silicone parts to swell up. Anyways, it hasn't proven to be a problem, thus far.
As I recall, I was using something like a 10% petroil mix.
The whole thing was just an experiment; the engine was subsequently re-converted to glow fuel. It did run very well on petrol, though.
Yeah, it would be a bit more tricky with a two-stroke engine, having a forward-mounted carb. Rear-induction types would be more appropriate.
There's a guy at our field who uses those special plugs. Same problem that all the conversions have ... carburation. A Walbro will very likely see you right. Prop clearance might be an issue, unless you are careful.
10-07-2016, 06:28 AM
#7
[QUOTE=bogbeagle;12265246]...
As I recall, I was using something like a 10% petroil mix..
QUOTE]
YS recommend 20 % oil, how long did the engine last with 10 % especially using less fuel (and less oil) than with glow fuel?
IMHO, you trashed a good engine that performs well and is not hard to tune/adjust using proper knowledge. But, that is just my opinion; not my circus, not my monkeys.
Sincerely, Richard
As I recall, I was using something like a 10% petroil mix..
QUOTE]
YS recommend 20 % oil, how long did the engine last with 10 % especially using less fuel (and less oil) than with glow fuel?
IMHO, you trashed a good engine that performs well and is not hard to tune/adjust using proper knowledge. But, that is just my opinion; not my circus, not my monkeys.
Sincerely, Richard
10-08-2016, 06:41 AM
#9
Originally Posted by Gizmo-RCU
Richard,
Give the guy a break, it's his engine and I personally found interest in his post, who knows what one might learn?
Give the guy a break, it's his engine and I personally found interest in his post, who knows what one might learn?
bogbeagle
, My sincere apologies for coming down on your project. The experiment was interesting and prompted some insight into the conversion process. Keep it up. It is your engine and i have no right to comment like I did.
Sincerely, Richard
