'48 L runs on carb cleaner... - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
 
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post #1 of 11 Old 08-03-2019, 08:45 PM Thread Starter
Lnk
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After cleaning out the edison magneto and setting the points, we now have spark. De-carboned the head and deck, unstuck exhaust valve, put some tranny fluid in the cylinder to soak the rings. Cylinder is scored, but compression is better than the '68 L8? Which was at 65 psi. Tank is filthy with rust, glass fuel bowl full of white powder. Copper fuel line plugged, carb gummed and full of ???. Got her to fire on carb cleaner. Not getting a steady fuel supply yet. Soaking with sea foam now. Probably be Monday before I can get to it. Good, let it soak.

These L's seem so much lighter than the 5240. Is the weight difference all due to the Kohler engine? Just seems so much different.
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post #2 of 11 Old 08-03-2019, 09:08 PM
jrd
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Re: '48 L runs on carb cleaner...

That sounds very encouraging!

If she sat for a while, esp exposed to the elements, the carb is likely to need rebuilding. The good news is that the cast iron zenith carbs are super simple.

I believe in your other post you said there had been some water contamination. If you haven't already, change out the oil, and be ready to do it again. Also, expect that the old cannister oil filter may be gummed up. That won't stop you from running it, because it's a bypass system, but you'll want to address it eventually. I've had some luck with back-flushing those old filters with solvent. You can occasionally find NOS ones, but they're very expensive.

Looking forward to more good news.

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post #3 of 11 Old 08-03-2019, 09:16 PM Thread Starter
Lnk
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Quote:
Originally Posted by jrd View Post
That sounds very encouraging!

If she sat for a while, esp exposed to the elements, the carb is likely to need rebuilding. The good news is that the cast iron zenith carbs are super simple.

I believe in your other post you said there had been some water contamination. If you haven't already, change out the oil, and be ready to do it again. Also, expect that the old cannister oil filter may be gummed up. That won't stop you from running it, because it's a bypass system, but you'll want to address it eventually. I've had some luck with back-flushing those old filters with solvent. You can occasionally find NOS ones, but they're very expensive.

Looking forward to more good news.
Drained the oil completely and put in 5 pints. Once I get it running, I will get her warmed up and do another oil change. She was outside, bit I don't know for how long. She is sleeping in the shed now, and will never have to spend another night outdoors. I am not someone that worries about show pieces. What is the best way to convert to spin on oil filter? Is it even possible with the low pressure system?

Really like this tractor, going to put her to work. I think she wants to work. I guess it's a she.....
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post #4 of 11 Old 08-04-2019, 07:13 AM
jrd
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Re: '48 L runs on carb cleaner...

See https://www.gravelymanuals.com/pdf/O...Conversion.pdf

The only part that's at all tricky is making sure you get the oil plumbing lines right. When you go to the newer filter, you need to replumb so that the pump feeds the main bearing directly, via a T fitting on the case. There are diagrams in that PDF.

Then you just spin on a PH8A or equivalent and you're good to go.

'41 L (not running)
'43 L
'44 L
'50 L
'52 L (not running)
'58 LI (not running)
'59 LI
'61 LS
'61 LS
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'62 LI (not running)
'63 L8
'66 L8
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'67 C8
'74 Comm 12
'75 C8
'73 812
'74 816
UFT Mountaineer 88E
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post #5 of 11 Old 08-04-2019, 09:30 PM Thread Starter
Lnk
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Quote:
Originally Posted by jrd View Post
See https://www.gravelymanuals.com/pdf/O...Conversion.pdf

The only part that's at all tricky is making sure you get the oil plumbing lines right. When you go to the newer filter, you need to replumb so that the pump feeds the main bearing directly, via a T fitting on the case. There are diagrams in that PDF.

Then you just spin on a PH8A or equivalent and you're good to go.
Thanks for the PDF. I read it this morning and am curious if all the parts needed are still available. Seems like it may not be worth it if it is going to be cost prohibitive. May try to back flush the filter and reuse it. Until I get time to get her running I can wait on that. Gotta put in some fence posts tomorrow so maybe Tuesday. Will post results of next effort.

Thanks again.
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post #6 of 11 Old 08-06-2019, 06:08 PM Thread Starter
Lnk
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Quote:
Originally Posted by jrd View Post
That sounds very encouraging!

If she sat for a while, esp exposed to the elements, the carb is likely to need rebuilding.

Looking forward to more good news.
Good news, she runs, and runs good. I cleaned the tank, sediment bowl, line and carb, added sea foam to the fuel and filed the carb. Went out today and she would not start even with good spark and compression. So off comes the carb and no flow out the fuel line. Plugged sediment bowl inlet. Once cleared, good flow out line. Re-installed carb, closed choke and started on the second pull. Only ran for a minute before I shut her down. Did have flow at oil fill, but less than the '68 L8, low vs high I know.

Now I need throttle cable, choke cable, fan belt and maybe governor. Oh, and a proper pull strap instead of clothesline. 😂

I need a new belt for the L8, would that be the same belt? Anyway, pretty excited. Why do I like these more than my 5240? Maybe cause they are older, like me....
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post #7 of 11 Old 08-07-2019, 08:13 AM
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Re: '48 L runs on carb cleaner...

Quote:
Originally Posted by Lnk View Post
Good news, she runs, and runs good. I cleaned the tank, sediment bowl, line and carb, added sea foam to the fuel and filed the carb. Went out today and she would not start even with good spark and compression. So off comes the carb and no flow out the fuel line. Plugged sediment bowl inlet. Once cleared, good flow out line. Re-installed carb, closed choke and started on the second pull. Only ran for a minute before I shut her down. Did have flow at oil fill, but less than the '68 L8, low vs high I know.

Now I need throttle cable, choke cable, fan belt and maybe governor. Oh, and a proper pull strap instead of clothesline. 😂

I need a new belt for the L8, would that be the same belt? Anyway, pretty excited. Why do I like these more than my 5240? Maybe cause they are older, like me....
Great update news! Yes, to the best of my knowledge, the 48L and your much younger L8 will take the same belt - 1/2" X 31".

Daryl G

1957 Gravely L
1974 Gravely C8
1973 Gravely CI
1967 Gravely C8
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post #8 of 11 Old 08-07-2019, 09:12 AM
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Re: '48 L runs on carb cleaner...

Since I don't speak "millennial" what is &#x1f602??
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post #9 of 11 Old 08-07-2019, 09:25 AM Thread Starter
Lnk
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Originally Posted by nhgravely View Post
Since I don't speak "millennial" what is 😂??
Pretty sure I am as far or farther from being a millennial as you are. It is called an emoji, according to my adult children, and this one is laughing at the fact that I am starting a gravely with cotton clothesline.

Sorry for the confusion.
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post #10 of 11 Old 08-09-2019, 09:43 AM
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Re: '48 L runs on carb cleaner...

Sorry, my computer only shows this as a bunch of symbols and numbers.
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post #11 of 11 Old 08-09-2019, 09:44 AM Thread Starter
Lnk
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Quote:
Originally Posted by nhgravely View Post
Sorry, my computer only shows this as a bunch of symbols and numbers.
Ok, that explains my confusion. Sorry about that. We're good.
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