Argo help

[Todd Thorne]

My son has been working on an Argo, with a B&R Vangaurd 18hp engine. To keep this short, the Argo has sat for a few years, not taken care of, but oil was changed, gas drained and tuned up before starting. He had it running for 30min or so, and after turning it off could not get it re-started, compression check both cyclinders are below 60psi. He was told there may be a pressure relief valve???

If so where is it?

Any ideas before we start to tear it apart?



Thanks for any info.

 

[RedRanger 7]

Always best to add fuel stabilizer to gas cans and engines so you know your carb will not gum up, it is cheap insurance.

If you can, spray quick start in the carb to see if that is the problem.

People slways think they will reuse their small engines next season, but you just never know for sure until next season comes around.

Good Luck with it, Dave :haveabeer:

 

[rod denton]

sounds like piston rings.are frozen and not allowing compression to build







i looked at a freinds argo no pressure relief if you engine has one it should at top of cylinder with in the area of compression with a thumb button or lever may cable to controls

 

[Wes Davis]

I had no idea what an Argo was so I YouTubed it.



<iframe width="420" height="315" src="http://www.youtube.com/embed/Q_J2AkMpwWk?rel=0" frameborder="0" allowfullscreen></iframe>

 

[JohnnyB]

Pretty cool. would love to play with one.

 

[James Easley]

So bumpy! That is cool.

 

[Todd Thorne]

I'll try the seaFoam treatment to free up the rings, I hope that is all it is. He said it didn't die on him so I don't think he fried a cylinder, but the timing my have jumped??? I have a couple of older sleds that I keep running, fuel stabilizer and fogging the cylinders each spring, keeping up maintenance and they keep running, over 23,000km on one of my sleds with no rebuilds yet the other is at 14,00km.



Thanks for the replies!nline:

 

[Gavin Allan]

Check out the Vanguard parts diagram. Sometimes compression release is incorporated with valve lifters. You may have gummed up valve too. Some diagnostic work will soon tell you without tearing down the engine. If it ran once OK, just sitting didn't wear it out-- it can run again. You just got to find the problem. Looks like a compression problem, but might not be if there is compression release. Next would be fuel, and spark.

 

[blksn8k]

Might try this forum:

 

[Todd Thorne]

upon futher inspection, both intake lifter rods where bent and intake valves gummed up and siezed, looks like some bad gas made it through the system. On a good note, the pistons and cylinders did not appear to be damaged, so I'm hoping the cam shaft survived and we are just replaceing the heads and push rods, I have not openned up the lower part of the engine yet.