My MS290 has given me trouble for several years. I am convienced that the trouble is carboration. I have to go through the carb once or twice a year just to keep it running. When it is running, I like the saw just fine. My brother has the same saw with easially twice the numer of hours on it and he has never had the carb off.
Getting ready to start getting firewood and my saw will not start, no suprize. Removed carb, disassembled, cleaned reassembled and and fired the saw up. I tuned the carb as follows:
1. L and H one turn out.
2. Started the saw and adjusted LA until chain started to move, then backed off slowly until chain stopped.
3. Closed L until the saw started to die (lean). Opened L 1/2 turn.
4. Opened H until the saw started to burble at full throttle.
The saw idled for ten min. without a hickup. Made a few test cuts, everything seemed fine. Shut the saw down for about 10 min. Since the saw was hot, I tried to start it with the switch in run position. Each pull of the rope resulted in 5 or 6 half hearted pops and then the saw would die. Choaked the saw for one rope pull and their was nothing. Went back to run and still nothing. Assuming that I flooded the thing, I went to full throttle with the switch in the run position and pulled 20 or so times, nothing. This happened once last year and after several days of trying to start the thing, I went through the carb again, it ran fine for a few cords before it set in again.
I have a new fuel line, new fuel filter and a freshly cleaned air cleaner.
I visited the local chainsaw shop. They have two replacement Walbro carbs. One costs about $30 and is the same thing I have now, I think. The other is three times the money.
Do I need a new carb and if so, is it worth the extra money to get the upgrade carb.
Getting ready to start getting firewood and my saw will not start, no suprize. Removed carb, disassembled, cleaned reassembled and and fired the saw up. I tuned the carb as follows:
1. L and H one turn out.
2. Started the saw and adjusted LA until chain started to move, then backed off slowly until chain stopped.
3. Closed L until the saw started to die (lean). Opened L 1/2 turn.
4. Opened H until the saw started to burble at full throttle.
The saw idled for ten min. without a hickup. Made a few test cuts, everything seemed fine. Shut the saw down for about 10 min. Since the saw was hot, I tried to start it with the switch in run position. Each pull of the rope resulted in 5 or 6 half hearted pops and then the saw would die. Choaked the saw for one rope pull and their was nothing. Went back to run and still nothing. Assuming that I flooded the thing, I went to full throttle with the switch in the run position and pulled 20 or so times, nothing. This happened once last year and after several days of trying to start the thing, I went through the carb again, it ran fine for a few cords before it set in again.
I have a new fuel line, new fuel filter and a freshly cleaned air cleaner.
I visited the local chainsaw shop. They have two replacement Walbro carbs. One costs about $30 and is the same thing I have now, I think. The other is three times the money.
Do I need a new carb and if so, is it worth the extra money to get the upgrade carb.