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Re-Doing a '63 Bolens 800


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#91 Bolens 1000 OFFLINE  

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Posted April 02, 2015 - 03:28 PM

Glad to hear your up and running!!!!!

 

When you make the final carb adjustments, make sure you let the engine warm up about 10 minutes or so before you do. 


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#92 rumbleseat OFFLINE  

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Posted April 02, 2015 - 03:49 PM

Here's the video

https://www.youtube....eature=youtu.be


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#93 Bolens 1000 OFFLINE  

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Posted April 02, 2015 - 03:56 PM

Nice!


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#94 rumbleseat OFFLINE  

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Posted April 02, 2015 - 08:01 PM

Carburetor adjustment questions:  What do the different screws do (top screw, middle screw and lower t-handle adjustment screw?  I need to do some fine tuning and am not sure which to do first, second or what each screw does or when to adjust it.  Idle is good and mid-throttle is ok and starts to get rough toward full throttle, full throttle wants to cut out.  Everything is new in the fuel system, red (no fuel pump) Briggs fuel filter and as you know the carb and valves have been re-done.  Any help is appreciated. Thanks


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#95 Kfs35 OFFLINE  

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Posted April 02, 2015 - 08:43 PM

Top one is the idle jet, middle is idle speed, and the bottom one is your main jet. If it's cutting out at high speed, it sounds like you need to turn the main jet counterclockwise a bit. That will give it more fuel.
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#96 rumbleseat OFFLINE  

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Posted April 02, 2015 - 11:12 PM

Top one is the idle jet, middle is idle speed, and the bottom one is your main jet. If it's cutting out at high speed, it sounds like you need to turn the main jet counterclockwise a bit. That will give it more fuel.

Thanks, I appreciate it.


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#97 rumbleseat OFFLINE  

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Posted April 06, 2015 - 02:47 PM

After parking the 800 the other day, I walked out last night and found the carburetor leaking out of the main jet adjustment screw with a puddle of fuel on the floor. Tried tightening it but that did nothing. I have the carb back off now and trying to find a solution. It looks like I may need a new main jet assembly (#93C71-49) or some sort of seal in there.

I found a main jet assembly #93C71-21 but not sure if it will work right or not, or what the difference is between the 93C71-49 my schematic calls for.


Edited by rumbleseat, April 06, 2015 - 02:50 PM.

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#98 Bolens 1000 OFFLINE  

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Posted April 06, 2015 - 03:07 PM

You will need to get the 93C71-49 , I stock them if needed. The differences  between the two jets are the needles are different lengths and are not interchangeable.


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#99 rumbleseat OFFLINE  

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Posted April 15, 2015 - 03:51 PM

Hey Gents,

 

Anyone have baseline settings (turns required) for the idle adjustment / jet screws on the carb I have (shown on page 6)?  It seems the more I try to get it set correctly, the worse the engine runs.

Right now, I can only idle rough with the choke on about 1/3 of the way.  It was running good, I changed the leaky main jet (bottom t-handle) and put it back to the same turns the other was set at and now I am worse off. It started, puffed black smoke so I turned down the bottom main jet and it didn't get any better.  I can't seem to find the correct formula in regards to the three adjustment screws. I am just fishing and guessing now and getting nowhere.  Any help or hints are appreciated. Thanks 


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#100 29 Chev ONLINE  

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Posted April 16, 2015 - 08:48 PM

Here is the settings from the tube frame manual - hope this helps.

Attached Files


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#101 Bolens 1000 OFFLINE  

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Posted April 17, 2015 - 06:43 AM

Gently screw in the needle valves until they stop. Then back them out approx 1-1/2 turns , this will give a baseline to get the engine running.

 

Let the tractor warm up for about 10 minutes before adjusting anything. Once the tractor has reached operating temperature move throttle to medium speed and start slowly moving the big valve first, go about 1/4 turn and wait about 30-40 seconds, if you move the settings to fast you'll never get a good result.

Most of the setting is made by the big needle , the small one is more to fine tune the engine at the high speed setting.


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#102 rumbleseat OFFLINE  

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Posted April 18, 2015 - 10:15 PM

Thanks for the help gents.  I'm headed back out there to try it again.  It almost seems like it's not getting enough fuel, which is weird because every part of the fuel system is clean or new.  If it sits and is cold, it will start right up and idle for 5-10 seconds then die.  I'll keep messing with it, I know she runs just got to figure out the settings.



#103 rumbleseat OFFLINE  

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Posted April 23, 2015 - 09:44 PM

When I got my 800, I had to scrounge around for used throttle and choke lever covers.  Mine were cracked to pieces. I am not sure why Bolens, as heavy as these machines are built, used plastic covers. Anyhow, with access (ocassionally) to a CNC machine, I have been experimenting with making aluminum ones.  These came out nice and solid.  I have a few details to still work out and they aren't an exact match on the outside, but once painted, I think they will look fine and hold up well.

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#104 Bruce Dorsi OFFLINE  

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Posted April 23, 2015 - 10:01 PM

Actually, most of the problems with those old controls were breakage of the metal lever or failure of the cable.

 

Nice work on the aluminum cover !!


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#105 Bolens 1000 OFFLINE  

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Posted April 24, 2015 - 07:11 AM

Wow Great Job on those covers!


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