Huztl MS660

[weimedog]

I'm using a walbro...so have not yet looked at the am carb. Won't get the it until the weekend. .

 

[SlurpJ]

Good to know, as you can see no jet. I might have to pull it apart some more and figure out how it works. Or did I get a paperweight....

 

[davhul]

It's under the metering diaphragm. Has a slot for a screw driver. I drilled the aftermarket carb jet. It was .062 like a wj69

 

[davhul]

Just seen your pic. Nope no jet to drill. Fixed jet

 

[Chris3558]

Hey guys,
I just placed my order for a MS660 kit today. I will post the outcome once it shows up. Thanks in advanced for all the info you guys have shared! Awesome!

 

[Bedford T]

Should be a walk in the park if you spend the time your waiting reading and taking notes. It will be fun

 

[Ash UK Chopper]

Evening all,

I've built my Farmertec MS660 up, ran it for a few tanks and thought I'd take it to bits to make sure all is well.

I did this as I was having to richen the low speed adjustment to get it to idle so much that I was to 2 turns out, thought something is not right. Was still revving and cutting nicely but dying when off the throttle and needing half choke to run again.

I took the pot off and unfortunately it's starting to get some score marks on both the intake and exhaust side. The piston has survived except some heavy abrasion marks about 1/8th of an inch from the bottom of the intake skirt... Possibly catching the gasket.. As I write this I think I might have the gasket in the wrong way up. I'll get some pictures tomorrow as it's nearly midnight as I type.

The top of the piston is coated in a film of oil as is the bore, the crank/bottom end seems a bit dry.....

I've never built a saw, just replaced pistons and such. I think I may have botched the crank seal picture included.

So please help.

1. Which way does the cylinder gasket go up?

2. Does the crank seal look correctly seated?

3. Should the case behind the clutch and such be coated in a black oily residue as it is in the pictures as well? I assume this may be a leaky crank seal?

Thank you to all.

Ash

 

[Bedford T]

From here the seal flywheel side looks puckered. Easy to pinch them.

 

[davhul]

Yeah. Looks like it has rolled outward. I would bet the spring has came off the back of the seal also. Sorry

 

[Ash UK Chopper]

From here the seal flywheel side looks puckered. Easy to pinch them.

What's the solution for remedy here? Split the case and start again with new seals or can the seal be picked or poked back into 'play'?

Thank you for the quick reply.

 

[Bedford T]

I meant clutch side, larger one.

i dont mean the clutch side. i am having a hard time with this new program or its my phone. could not correct myself fast enough

 

[Bedford T]

you dont have to start over and mess with the case. just the seal. and fixing your top end. i am doing a similar thing. my jug was not tack down tight enough on one side and is being replaced

 

[Bedford T]

Here's mine

 

[Ash UK Chopper]

I think the top end luckily still has life in it, still 160psi compression. So I'll get this seal shifted and it'll be game on hopefully!

 

[Bedford T]

 

[Ash UK Chopper]

Yes, pretty obvious I have buggered up my seal....

Next question

How do I get my seal seated correctly? How do I remove it?
New seal time?

Thank you for the pictures

 

[Bedford T]

there is a post of me removing one of my seals with a screw buried in this thread. i drilled a half moon and pushed a screw through it and popped it out. press it in fully, even, using some oil on the shaft.

i fussed about the seals being installed because as you can see its easy to pucker them

let me share something i just learned. if you own a chainsaw you should also have a pressure/vacuum gun. that is absolute. you must do the checks as you maintain your saw. you will find problems before they cost you money and slow you down. if you had done a check you would have found that seal leaking. it leans your saw and shortens its life. all over a not having a $50 tool.

i just bought one and i am certain it solved my current problem and will help me find and fix others as the saw ages. it also works on your blowers trimmers etc

you said something earlier, you have never put a chainsaw together. very few people have. us kit people have, from scratch. we just need experience in troubleshooting them and that comes with it free of charge as you can see.

 

[Bedford T]

 

[Ash UK Chopper]

Thanks good info.

I'm glad I've learned a lesson on this saw rather than my work saws. I'm looking at a £25 fix rather than a £200, £300, £500+++++ blunder!

I agree, I need to be able to pressure test the crank case. Any links to the particular gear you use?

I assume one just buys a sheet of gasket material or old inner tube and cuts out a couple of lumps to put between the carb and pot and pot and exhaust to seal the engine to test....

Thanks again

Ash

 

[Bedford T]

I just found the muffler is not good enough. Looks like you are across the pond so I will just say on the gun it needs to do both pressure vac. Mityvac 8500 is popular. I got a clone.

And a piece of steel cut like the muffler gasket and then some strips of thick rubber to seal the exhaust works best.

It's more than your crankcase, you have your fuel delivery system and the gun with test your carb as well