tlwright21
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- Joined
- Mar 13, 2017
- Threads
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- 7
I have a LB model 10304 series 6914509 that I bought new in 1996. It replaced a LB that was purchased in 1973- so you can say I bleed LB green.
Last summer it started giving me trouble starting up. would press primer 2-3x, engine would fire then die. If I continued to press primer over and over again it would eventually come up to speed and run. would take a long time though but once it was warm it would mow with full power. full disclosure-last summer I ended up hitting a bolt on the bottom of a fire hydrant that bent the blade and stopped the engine. Bought a new blade and resumed using but this was when the problem with engine running began. there was no unusual vibration afterwards like a bent shaft, but it took forever for it to get up to speed and starting running on its on without constant priming.
Last week I put in a new plug and cleaned air filter and it started right up and I mowed -no problem. thought I cured it.
This week back to same old problem. Now I think I may have low engine vacuum and it isn't pulling fuel through the reed valve. wonder if I may have damaged shaft seal but not sure and don't know how to ck. Engine will not staying running now unless you prime as fast as you can and then maybe it will run.
So this is what i have done in the last 24 hours. problem did not go away. still wont' run
1. cleaned air filter,
2 cleaned muffler
3 disassembled carburetor, cleaned jet, holder , needle, seat, float with carb cleaner. blew through all openings all clear
4. drained gas tank, checked fuel line,all clear no restrictions
5 took apart primer bulb, checked line, no leaks.
6. checked intake gaskets and float bowl gasket and they are intact
7. carb is getting fuel into bowl. Spilled out when i took apart
8 took off fuel cap and tried to start, made no difference
other than a possible problem with vacuum I'm wondering about the air vane settings or its spring tension. can someone tell me where the position of the air vane is when at full throttle? Im talking about is it in the center of the slot or to the right or left when looking at it from the rear of the mower? when it was running, right before it died, I got down and observed the air vane was all the way to the left. So i think that means the throttle plate is completely closed (full choke???). Is that correct, if not then what do i need to do? Not sure how the air -vane modulates the throttle, does it change position when the engine gets warmer or mowing in heavy grass, like a governor.
HELP Don't want to give up on the mower but its getting close
Last summer it started giving me trouble starting up. would press primer 2-3x, engine would fire then die. If I continued to press primer over and over again it would eventually come up to speed and run. would take a long time though but once it was warm it would mow with full power. full disclosure-last summer I ended up hitting a bolt on the bottom of a fire hydrant that bent the blade and stopped the engine. Bought a new blade and resumed using but this was when the problem with engine running began. there was no unusual vibration afterwards like a bent shaft, but it took forever for it to get up to speed and starting running on its on without constant priming.
Last week I put in a new plug and cleaned air filter and it started right up and I mowed -no problem. thought I cured it.
This week back to same old problem. Now I think I may have low engine vacuum and it isn't pulling fuel through the reed valve. wonder if I may have damaged shaft seal but not sure and don't know how to ck. Engine will not staying running now unless you prime as fast as you can and then maybe it will run.
So this is what i have done in the last 24 hours. problem did not go away. still wont' run
1. cleaned air filter,
2 cleaned muffler
3 disassembled carburetor, cleaned jet, holder , needle, seat, float with carb cleaner. blew through all openings all clear
4. drained gas tank, checked fuel line,all clear no restrictions
5 took apart primer bulb, checked line, no leaks.
6. checked intake gaskets and float bowl gasket and they are intact
7. carb is getting fuel into bowl. Spilled out when i took apart
8 took off fuel cap and tried to start, made no difference
other than a possible problem with vacuum I'm wondering about the air vane settings or its spring tension. can someone tell me where the position of the air vane is when at full throttle? Im talking about is it in the center of the slot or to the right or left when looking at it from the rear of the mower? when it was running, right before it died, I got down and observed the air vane was all the way to the left. So i think that means the throttle plate is completely closed (full choke???). Is that correct, if not then what do i need to do? Not sure how the air -vane modulates the throttle, does it change position when the engine gets warmer or mowing in heavy grass, like a governor.
HELP Don't want to give up on the mower but its getting close
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