jdm
Groundie
Posts: 5 
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Post by jdm on Oct 26, 2017 17:00:06 GMT -5
I took this little generator out of the dump when I was 17. It was seized. I figured that it didn't generate power, therefore thrown away, and being exposed to the weather seized it. Took it home, my uncle worked for Homelite when they were in Port Chester, NY. He got the parts, and it ran, and generated power. Have had it ever since. It has developed carb issues, sticking float, hard starting. I got a Tillotson MT rebuild kit, pulled it apart, cleaned and blew everything out, and reassembled. It started right up, but seems to run very rich, and at low speed, not the rpm it needs to be running at. I've adjusted both needles in both directions, and it will smooth out a bit, but not get to the proper rpm, even if I manually open the throttle from its normal running position. Any thoughts?
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Post by sweepleader on Oct 26, 2017 19:00:48 GMT -5
Welcome to the House of Homelite. I am sure someone here will be able to help, there are a lot of Homelite folks here. I don't know a lot about those carbs but it sounds a little like it is running too rich or maybe the points have closed up. Have you checked the points? Hang on and someone will know what it is.
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Post by undee70ss on Oct 26, 2017 21:38:20 GMT -5
I agree. I would check the points first, making sure there clean and the correct gap.
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jdm
Groundie
Posts: 5
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Post by jdm on Oct 29, 2017 11:50:12 GMT -5
Thanks for your responses, guys. Points are clean and set. Engine starts right up, but won't come up to proper rpm. Does anyone have an exploded view of a Tillotson MT53A carb? Can't find anything online at all. I'd like to be sure carb is assembled properly.
many thanks!
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Post by Supercharged86 on Oct 29, 2017 13:47:16 GMT -5
Hi JDM, Just a couple of thoughts here on your problem. My father has a late 40's 23A115-1 model that runs perfect, his thoughts are these. If your carburetor is similar to his, there's a speed adjustment needle down behind the air cleaner, sort of purposely put in a hard to reach spot. If that's not the issue then you may have a faulty capacitor; a weak one will most certainly keep it from running at speed. A true measurement should be obtained using a capacitor tester (if need be, we can help you with this). Lastly, what spark plug are you using? His generator calls for a Champion HO-8A plug, it will virtually not run on anything else. Good luck. Steve
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jdm
Groundie
Posts: 5
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Post by jdm on Oct 30, 2017 16:18:46 GMT -5
HI Steve, I am familiar with the needle down on the lower side of the carb. This engine, although difficult to start, and carb overfilling due to dirty needle and seat, has always run very well. Due to these carb problems, I decided to pull it apart, and clean it. I got a kit for the MT53A carb online, and tore it down, and completely cleaned it, reassembled it, and then had this problem of low rpm. If I cover the breather with my hand, and block most of the intake air, it will speed up, but, not to proper operating rpm. I have taken it off twice, and double checked everything, and it all appears to be clean, and in good order. It has always run on a Champion J8 since I resurected it in 1977 without issue. I am usually pretty good with this stuff, however, I am stumped by this one. I was wondering if anyone has an exploded view of the Tillotson M53A carb? Just to make sure it is together properly.I appreciate the response!
Many thanks,
JDM
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Post by sweepleader on Oct 31, 2017 6:36:40 GMT -5
If cutting off the air improves things, the fuel supply is restricted. Check the fuel line all the way to the end in the tank. I don't know but there may be a filter on the end inside the tank or the line might be kinked or collapsed. It may also be cracked and sucking air instead of fuel. There may be a loose connection too.
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jdm
Groundie
Posts: 5
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Post by jdm on Nov 1, 2017 17:17:51 GMT -5
Ok, Further developments. I agree, that if cutting down the intake air, and rpm's pick up, then fuel supply is restricted. I pulled off the pulley today, and checked the points, that they were clean, and set to .020 as indicated on the backing plate. All set there, and spark is good. Still having the low rpm problem. I was going to pull the carb off again, to go through it, to make sure. While it was running, I turned off the fuel valve, (BTW, I pulled fuel line off of carb, and opened fuel valve, and plenty of fuel came through the fuel line.) and in short order, the rpm picked right up to the proper speed before it ran the carb out of fuel. So, very perplexed. On one hand, it seems like there isn't enough fuel, while it's running, and on the other, it seems like there is too much fuel, as indicated by the increase to normal rpm after turning off the fuel. I got a diagram for the MT type carb from Tillotson, in Ireland, and it does give the specs for setting the float height, which I will try tomorrow.
Any other thoughts?
Many thanks,
JDM
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Post by sweepleader on Nov 1, 2017 19:16:28 GMT -5
Might be the float is binding on something in the bowl, or it is just set too high. Does fuel leak out of the carb when the engine is shut off? Speeding up with fuel shut off does not fit well with cutting off air and speeding up. Those two things should be mutually exclusive. If you changed the needle, you should set the float. If the specs don't pan out, I have had good luck with other carbs setting the float level when the carb is held upside down and the float resting on the needle. The float level is not sacred, set it where the fuel mix can be adjusted rich to lean. This would be general carb information, I have not worked on one of the ones you have.
You might try closing the fuel shut off valve most of the way, to see if you can regulate the fuel flow that way. If the engine speed returns to normal, you might try adjusting the mix at that time and see what happens. If all is good then you know there is too much fuel for sure and you will have narrowed things down a bit.
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jdm
Groundie
Posts: 5
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Post by jdm on Nov 1, 2017 21:48:34 GMT -5
Thanks, Dan! I agree, those two scenarios do not go together at all. I think tomorrow, I'll set the float height. In the info I got from Tillotson, included setting the float height. Sounds good. I really appreciate your input!!!
Very best.
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Post by Justen h on Mar 28, 2018 22:08:14 GMT -5
HI Steve, I am familiar with the needle down on the lower side of the carb. This engine, although difficult to start, and carb overfilling due to dirty needle and seat, has always run very well. Due to these carb problems, I decided to pull it apart, and clean it. I got a kit for the MT53A carb online, and tore it down, and completely cleaned it, reassembled it, and then had this problem of low rpm. If I cover the breather with my hand, and block most of the intake air, it will speed up, but, not to proper operating rpm. I have taken it off twice, and double checked everything, and it all appears to be clean, and in good order. It has always run on a Champion J8 since I resurected it in 1977 without issue. I am usually pretty good with this stuff, however, I am stumped by this one. I was wondering if anyone has an exploded view of the Tillotson M53A carb? Just to make sure it is together properly.I appreciate the response! Many thanks, JDM |
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Post by Justen h on Mar 28, 2018 22:11:00 GMT -5
I've been looking everywhere for a mt53a carb kit. I have the same genny. Where did you find it?
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Post by jerseyhighlander on Mar 29, 2018 9:27:05 GMT -5
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Deleted
Deleted Member
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Post by Deleted on Mar 29, 2018 9:47:02 GMT -5
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Deleted
Deleted Member
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Post by Deleted on Mar 29, 2018 11:47:28 GMT -5
This place is in Tennessee and is recommended by Tillotson in Ireland as a place for servicing vintage carbs. I used them once and had very good experience with them. eccarburetors.com/estore/ |
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Deleted
Deleted Member
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Post by Deleted on Mar 29, 2018 20:00:09 GMT -5
I contacted them not so long ago when I was looking for some parts for a relatively not so old carb & they didn't even return an email.It was an HU63A that I was looking for parts.They used those carbs a lot in the '80's.
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Post by Justen h on Mar 30, 2018 19:09:25 GMT -5
Thanks guys
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Post by Justen h on May 17, 2018 19:56:50 GMT -5
Does anyone have a MT53A that they'd be willing to sell? If so please let me know. Justenharmonsr07@gmail.com
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Post by Johner on Mar 20, 2019 22:30:37 GMT -5
Might be the float is binding on something in the bowl, or it is just set too high. Does fuel leak out of the carb when the engine is shut off? Speeding up with fuel shut off does not fit well with cutting off air and speeding up. Those two things should be mutually exclusive. If you changed the needle, you should set the float. If the specs don't pan out, I have had good luck with other carbs setting the float level when the carb is held upside down and the float resting on the needle. The float level is not sacred, set it where the fuel mix can be adjusted rich to lean. This would be general carb information, I have not worked on one of the ones you have. You might try closing the fuel shut off valve most of the way, to see if you can regulate the fuel flow that way. If the engine speed returns to normal, you might try adjusting the mix at that time and see what happens. If all is good then you know there is too much fuel for sure and you will have narrowed things down a bit. |
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Post by Johner on Mar 20, 2019 22:40:58 GMT -5
Check the exhaust port for blockage . If it can't get out it won't come in. I just acquired one of these little guys man are they heavy, checked compression, might be ok, looked in the cylinder it has deposits on the piston. Has not run in 10 years. ALL SO use a high test gas 89 or better. Need the octane with blended fuel.
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