Home |
Search |
Today's Posts |
|
Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
I had a problem where the engine would die when set at half-choke and
the throttle was advanced. (Could be advanced a little without dying but not full.) At no choke the engine would not run at all. I tried adjusting the jets to no avail- I purchased a Zama rebuild kit. When installing, the carb looked extremely clean and no parts appeared damaged or worn. I did not soak the carb at all, maybe a bad idea. On reassembly the engine runs better but not perfectly. It now runs fairly fast at no choke, but still runs better at half. It wants to go to full throttle at half choke but then seems to run unevenly and slower. Oddly, when then moved to no choke the rpms increase to almost full throttle but then go back down again. Three options to do next: (1) Take the carb off again, re-disassemble and soak. (2) Assume the tank strainer has a problem (what to do if it's that?) (likelihood?) (3) Assume the gas is bad and replace. (Gas is LT 6mo old.) What would you do *first*? Thanks for help! Frank |
#2
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
I'd put Permatex IIb non hardening on both sides of the gasket betwen the
carb and the machine. I've had a leaky gasket do that, more than once. When that happens, the machine draws air after the carb, and runs lean. -- Christopher A. Young Learn more about Jesus www.lds.org .. "frank1492" wrote in message ... I had a problem where the engine would die when set at half-choke and the throttle was advanced. (Could be advanced a little without dying but not full.) At no choke the engine would not run at all. I tried adjusting the jets to no avail- I purchased a Zama rebuild kit. When installing, the carb looked extremely clean and no parts appeared damaged or worn. I did not soak the carb at all, maybe a bad idea. On reassembly the engine runs better but not perfectly. It now runs fairly fast at no choke, but still runs better at half. It wants to go to full throttle at half choke but then seems to run unevenly and slower. Oddly, when then moved to no choke the rpms increase to almost full throttle but then go back down again. Three options to do next: (1) Take the carb off again, re-disassemble and soak. (2) Assume the tank strainer has a problem (what to do if it's that?) (likelihood?) (3) Assume the gas is bad and replace. (Gas is LT 6mo old.) What would you do *first*? Thanks for help! Frank |
#3
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
Hmmm...I had actually thought of that- should have been option 4.
Will give it a shot. Thanks. The fact that when reassembled there was a slight improvement also supports your idea because I think the carb kit did nothing. BTW how likely is it ever that the strainer in the bottom of the fuel tank gets partially plugged? And how often does an overhaul kit improve things? Nothing I saw in the kit looks like it could go bad except possible the diaphragm, and while mine looked a *little* floppy I doubt that would cause problems. Frank On Thu, 15 Dec 2011 17:22:56 -0500, "Stormin Mormon" wrote: I'd put Permatex IIb non hardening on both sides of the gasket betwen the carb and the machine. I've had a leaky gasket do that, more than once. When that happens, the machine draws air after the carb, and runs lean. |
#4
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
On 12/15/2011 6:57 PM, frank1492 wrote:
Hmmm...I had actually thought of that- should have been option 4. Will give it a shot. Thanks. The fact that when reassembled there was a slight improvement also supports your idea because I think the carb kit did nothing. BTW how likely is it ever that the strainer in the bottom of the fuel tank gets partially plugged? And how often does an overhaul kit improve things? Nothing I saw in the kit looks like it could go bad except possible the diaphragm, and while mine looked a *little* floppy I doubt that would cause problems. Frank In my experience rebuilding carbs the problem is almost always dirt in a jet or orifice or somewhere, I seldom buy a rebuild kit and often make new gaskets myself. Not very often do they need any new parts. |
#5
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
Y'welcome. Just sharing what I have learned. I'm sure some mower repair guys
are cursing me for costing them a repair call. Ah, well. It's the economy. Strainers do get plugged. How often? I don't know. If yours is a two stroke, with flexible gas line. you will need a bent wire with a hook on the end, to get the hose to come out, and let you get at the intake filter. Filter probably has weight built into it, to keep the pickup down into the fuel. Best of luck, please let us know how it works out. Christopher A. Young Learn more about Jesus www.lds.org .. "frank1492" wrote in message ... Hmmm...I had actually thought of that- should have been option 4. Will give it a shot. Thanks. The fact that when reassembled there was a slight improvement also supports your idea because I think the carb kit did nothing. BTW how likely is it ever that the strainer in the bottom of the fuel tank gets partially plugged? And how often does an overhaul kit improve things? Nothing I saw in the kit looks like it could go bad except possible the diaphragm, and while mine looked a *little* floppy I doubt that would cause problems. Frank On Thu, 15 Dec 2011 17:22:56 -0500, "Stormin Mormon" wrote: I'd put Permatex IIb non hardening on both sides of the gasket betwen the carb and the machine. I've had a leaky gasket do that, more than once. When that happens, the machine draws air after the carb, and runs lean. |
#6
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
On Dec 15, 9:55*pm, "Stormin Mormon"
wrote: Y'welcome. Just sharing what I have learned. I'm sure some mower repair guys are cursing me for costing them a repair call. Ah, well. It's the economy.. Strainers do get plugged. How often? I don't know. If yours is a two stroke, with flexible gas line. you will need a bent wire with a hook on the end, to get the hose to come out, and let you get at the intake filter. Filter probably has weight built into it, to keep the pickup down into the fuel. Best of luck, please let us know how it works out. Christopher A. Young Learn more about Jesus *www.lds.org . "frank1492" wrote in message ... Hmmm...I had actually thought of that- should have been option 4. Will give it a shot. Thanks. * * *The fact that when reassembled there was a slight improvement also supports your idea because I think the carb kit did nothing. * * *BTW how likely is it ever that the strainer in the bottom of the fuel tank gets partially plugged? And how often does an overhaul kit improve things? *Nothing I saw in the kit looks like it could go bad except possible the diaphragm, and while mine looked a *little* floppy I doubt that would cause problems. * * *Frank On Thu, 15 Dec 2011 17:22:56 -0500, "Stormin Mormon" wrote: I'd put Permatex IIb non hardening on both sides of the gasket betwen the carb and the machine. I've had a leaky gasket do that, more than once. When that happens, the machine draws air after the carb, and runs lean.- Hide quoted text - - Show quoted text - For what it's worth, I have a Sears leaf blower that ran at higher speed at half choke than it did with no choke. And that was right out of the box. I probably should have taken it back, but it was only a little faster at half choke than no choke. I've used it several years now and sometimes it runs better at half, sometimes better at full, but it works well enough that it's not a real problem. I think part of the problem is that now we have these carbs that you can't adjust. With previous ones, a simple screw driver would have fixed it. And that could be part of Frank's problem too. |
#7
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
Frank,
Why are you rebuilding the carb? What diagnostic tests lead you to suspect the carb? Have you checked for vacuum leaks? It sounds like you're running lean. Get a can of carb cleaner. Start the engine and let it run for a minute or two. Spray carb cleaner where the carb bolts to the head. Does the engine stumble? If yes, then fix the leak. Spray the head gasket. Did the engine stumble? Et c. I doubt that you have bad gas or a bad filter but these are easy to replace. Dave M. |
#8
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
Still trying to find the time to get at this....
Will post message when I do. Thanks again all. Frank |
#9
Posted to alt.home.repair
|
|||
|
|||
Carb Overhaul on Homelite Vac Attack II
On Dec 15, 5:02*pm, frank1492 wrote:
I had a problem where the engine would die when set at half-choke and the throttle was advanced. (Could be advanced a little without dying but not full.) At no choke the engine would not run at all. I tried adjusting the jets to no avail- * * *I purchased a Zama rebuild kit. When installing, the carb looked extremely clean and no parts appeared damaged or worn. I did not soak the carb at all, maybe a bad idea. * * *On reassembly the engine runs better but not perfectly. It *now runs fairly fast at no choke, but still runs better at half. It wants to go to full throttle at half choke but then seems to run unevenly and slower. Oddly, when then moved to no choke the rpms increase to almost full throttle but then go back down again. * * *Three options to do next: * * *(1) Take the carb off again, re-disassemble and soak. * * *(2) Assume the tank strainer has a problem (what to do if it's that?) (likelihood?) * * *(3) Assume the gas is bad and replace. (Gas is LT 6mo old.) * * What would you do *first*? * * Thanks for help! * * * * *Frank I would replace the fuel ines, make sure the plug is tight, make sure the is no air getting in the crankcase ( make sure bolts are tight on crankcase cover and head). Hank |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
OT-Military benefits overhaul | Metalworking | |||
OT Starter overhaul | Metalworking | |||
My woodturning website needs an overhaul, please help! | Woodturning | |||
Machine overhaul | Metalworking |