Ms362-Z Very Hard to Start

[etbrown4]

I've tried all the usual tricks including starting fluid. Compression is strong. Spark is strong with spark tester, medium strong on the tiny bosch plug.

Would check to see if choke is fully closing but not obvious how to remove that black plastic in front of carb intake. Yes filter is off.

Suggestions appreciated?

Besides Bosch R10, what other plug are you using

 

[etbrown4]

Any tips on removing the black plastic thing on front of the carb? Filter is off.

 

[atpchas]

Any tips on removing the black plastic thing on front of the carb? Filter is off.

Have you checked YouTube? This might help:

 

[etbrown4]

It's a good video
It looks as if the black plastic outer piece comes off just by removing linkage, and prying up on two pivot points. However going back on it shows securing the two carb machine nuts.

Either way, once i get the black plastic off, I'll be able to tell if the choke is fully closimg. And go from there. Tks.

 

[ZeroJunk]

It's a good video
It looks as if the black plastic outer piece comes off just by removing linkage, and prying up on two pivot points. However going back on it shows securing the two carb machine nuts.

Either way, once i get the black plastic off, I'll be able to tell if the choke is fully closimg. And go from there. Tks.

Tilt the cover toward the switch side and be careful with the wiring. Maybe take a photo of the kill switch arrangement in case it comes loose.

 

[etbrown4]

Success.
I put in another new plug. Pull 4 times with choke, nothing. Move to run position, pull 20 times, nothing. 21st pull smoke at exhaust. 22nd pull she started, and runs smoothly.

Will wait a few hours and see if it starts.

 

[lone wolf]

I've tried all the usual tricks including starting fluid. Compression is strong. Spark is strong with spark tester, medium strong on the tiny bosch plug.

Would check to see if choke is fully closing but not obvious how to remove that black plastic in front of carb intake. Yes filter is off.

Suggestions appreciated?

Besides Bosch R10, what other plug are you using

What color is the plug, is it tan or black, might be fouled.

 

[etbrown4]

Spanking new plug Ngk cmr6h

 

[lone wolf]

Spanking new plug Ngk cmr6h

What led up to this, what's the history of the saw?
Maybe flooded?
Choke closing 100 percent?

Take the air filter off and remove the plug and pull it over and see if it pumps gas out ,then try again.

 

[farmer steve]

Spanking new plug Ngk cmr6h

I switched to NGK when Bosch became chinesium. To many problems with them.

 

[etbrown4]

It's nearly new, maybe 5 hours on saw. Otherwise don't know history. I figure that hard starting is why first owner sold it.

I'll let her cool down a few hours and try again. Fingers crossed.

 

[etbrown4]

It's all good. Now starting 2nd pull. All I can tell you after working on 2 strokes for 50 years is it must have been a sneaky Bosch R10 plug. It tested well outside the motor but wouldn't start it. A new Ngk CMR6h did it. Previously I have used Champion R27c successfully.