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 My Small Engine Projects

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MatthewD
Prybar
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Join date : 2014-11-16
Posts : 1993

My Small Engine Projects - Page 2 Empty
PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeMon Apr 09, 2018 1:49 pm

@MightyRaze wrote:
Sweet... don't know why but your idea in this thread is very interesting.
Thanks, I seem to have a thing for collecting engines and not working on them and the plan for this thread was to motivate me to work on them. Don't think it's worked lol Razz
@AllisKidD21 wrote:
Yeah I agree, the steam engine idea is super neat!
Thanks Allis, a steam engine would be pretty cool.
@RichieRichOverdrive wrote:
Be careful with your boiler, superheated water is dangerous stuff.
Yeah, and it's at high pressure. I don't really think a boiler is feasible in the near future but it would be nice. In the meantime I need to pull the engine apart and take the cam out to modify the lobes and hopefully make it more efficient.
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MatthewD
Prybar
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MatthewD

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeTue Apr 24, 2018 3:43 pm

I've chosen 3 engines to fix up/work on now that it's coming into summer and hopefully that will get them off my to-do list.

No 1: A 1978 Flymo lawn mower. I think I have a thread on this somewhere on the forum but I'll just detail the project in here. I need a rough cut mower to cut the grass verges on our lane so this would be perfect. It's got a 3.5hp Briggs (not the original). The plan is to drill and tap the crank shaft for the blade adaptor, order a carb rebuild kit (it's the older auto choke carb) and fix the rear 'grass gate'. It's been sitting like this for ages and it's time to resurrect it. 
My Small Engine Projects - Page 2 Img_2087

No 2: Build up a 3.5hp Briggs with float carb, no governor, AK's advanced timing trick, performance exhaust, porting & polishing. I think it would be a cool little engine and I might put it in a small RER or something similar.
My Small Engine Projects - Page 2 Img_2088
My Small Engine Projects - Page 2 Img_2090

Finally No 3: This is a 6hp single cyl diesel engine I've had for a while. Plan is to build a hydraulic log splitter for splitting the firewood, it's a shame to see this one sitting doing nothing so I think an application where it's sitting on a steady RPM is better than if it was on a go-kart or tractor.
My Small Engine Projects - Page 2 Img_2089
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AllisKidD21
Moderator
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AllisKidD21

Age : 21
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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeTue Apr 24, 2018 4:24 pm

That 3.5hp build up should be pretty neat, looking forward to seeing That!

_______________________________________________
"This'll either wake you up or put you to sleep forever!"- Red Green         "Whatever you do you should do right, even if it's something wrong." - Hank Hill
      - MTD Off-Road Build     
      - Ford LT 110 Off-Road Build
      - Craftsman GT 6000 Off-Road Build

  - Allis B-110, 710 & 716 - Wheel Horse 655 & 953 - Case 444 - Bolens Versamatic & 1668 - Cub 106 & 124 - Ford LGT 125 & 145 -
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Double W Cross Ranch
DimeWeld
DimeWeld
Double W Cross Ranch

Age : 16
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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeTue Apr 24, 2018 4:50 pm

You wouldn't be interested in selling that diesel would you? I have a JD 110 that would just love it!
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MatthewD
Prybar
Prybar
MatthewD

Age : 19
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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeTue Apr 24, 2018 4:59 pm

@AllisKidD21 wrote:
That 3.5hp build up should be pretty neat, looking forward to seeing That!
Yeah I'm looking forward to building it. Will be interesting to see what power difference it has compared to the stock 3.5 in the mower. Btw, the carb I'm planning to use is a Walbro off a 3.5hp Tecumseh. I can't find it at the minute but I'm sure I still have it.
@Double W Cross Ranch wrote:
You wouldn't be interested in selling that diesel would you?  I have a JD 110 that would just love it!
The cost to post it might be a little steep, haha. Na, she's staying here, I think her powering a log splitter would be pretty cool. Also it would save my back from swinging a hatchet Razz
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Double W Cross Ranch
DimeWeld
DimeWeld
Double W Cross Ranch

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PostSubject: Re: My collection of small engines   My Small Engine Projects - Page 2 Icon_minitimeTue Apr 24, 2018 5:13 pm

@MatthewD wrote:
@Double W Cross Ranch wrote:
You wouldn't be interested in selling that diesel would you?  I have a JD 110 that would just love it!
The cost to post it might be a little steep, haha. Na, she's staying here, I think her powering a log splitter would be pretty cool. Also it would save my back from swinging a hatchet [smiley]https://2img.net/i/fa/i/smiles/icon_razz.gif[/smiley]

Haha I was mostly joking. But would you happen to know where the engine came from?
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MatthewD
Prybar
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MatthewD

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeWed Apr 25, 2018 1:33 pm

I knew that Very Happy I got her from ebay.
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MatthewD
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MatthewD

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSat Apr 28, 2018 6:45 pm

Started on the 3.5 Briggs build up, I'm pretty excited to work on this project.

Put on the starter cup & tightened down the flywheel nut and removed the vane governor.
My Small Engine Projects - Page 2 Img_2095
Found a shroud that is in reasonable condition. The date on it is 00, but the original shroud says the engine is 02. The original shroud also says it's a 3.75hp Briggs but I can't see any difference in the blocks or anything. 
My Small Engine Projects - Page 2 Img_2096
Recoil with the innards added.
My Small Engine Projects - Page 2 Img_2097
Looks like a 3.5 Briggs now.
My Small Engine Projects - Page 2 Img_2100
Found the Walbro carb I'm going to use. Off a 3.5hp Tecumseh.  
My Small Engine Projects - Page 2 Img_2099
Measured the diameter of the intake, it's about 20mm. 

My Small Engine Projects - Page 2 Img_2098
My Small Engine Projects - Page 2 Img_2101
Here's the only markings I could find on the carb, it's not a great picture, I'll try and get a better one tomorrow.
My Small Engine Projects - Page 2 Img_2103
This is approximately where the carb will go. I think I'm going to get an M20 washer, and use that as the flange for bolting the carb to. Then weld an intake pipe with a 90 degree, and weld that to the original metal intake tube (you can see the tip of it just left and down a bit from the carb)
My Small Engine Projects - Page 2 Img_2102
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muckmudd
Vice Grip
Vice Grip
muckmudd

Age : 17
Join date : 2017-07-11
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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSat Apr 28, 2018 7:55 pm

I like that diesel. I have about 5 of those 3.5HP Briggs classics at the moment.

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MightyRaze
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MightyRaze

Age : 45
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Location : Shawnee, OK

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSat Apr 28, 2018 7:55 pm

Nice... have a plan for the motor when complete?

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MatthewD
Prybar
Prybar
MatthewD

Age : 19
Join date : 2014-11-16
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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSun Apr 29, 2018 6:06 am

@muckmudd wrote:
I like that diesel. I have about 5 of those 3.5HP Briggs classics at the moment.
Thanks Muck, I had 5 of the 3.5 Briggs at one point too.
@MightyRaze wrote:
Nice... have a plan for the motor when complete?
Thanks Mighty! I think it would be cool in a little RER or mini lawn tractor, or I could put in it a push mower. Who knows Smile
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MatthewD
Prybar
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MatthewD

Age : 19
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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSun Apr 29, 2018 3:49 pm

Decided I'm going to put the carb here, because in the other configuration I couldn't adjust the idle/fuel mixture screws and the intake tube would be longer and would have a sharp 90 degree turn in it.
My Small Engine Projects - Page 2 Img_2105
Removed the throttle plate and coil to remove intake tube
My Small Engine Projects - Page 2 Img_2104
Intake tube has a few dinges in it but I think this is to clear the coil and block.
My Small Engine Projects - Page 2 Img_2111
My Small Engine Projects - Page 2 Img_2109
Onto the air filter, here's the Tecumseh air box.
My Small Engine Projects - Page 2 Img_2106
Took off the top and I plan on cutting the bit with the holes in it to use on the Briggs.
My Small Engine Projects - Page 2 Img_2108
My Small Engine Projects - Page 2 Img_2110
Found the Tecumseh intake manifold with the throttle linkages and stuff but I don't think I could use it on this.
My Small Engine Projects - Page 2 Img_2112
Removed the muffler and valve cover because there was some oil leaking out of the valve cover. One of the bolts was loose so hopefully it will stop the oil leak.
My Small Engine Projects - Page 2 Img_2113
Cleaned it up and put the valve cover back on. Also installed a thread on muffler, it will do for now and means I can access the valve cover without removing the muffler.
My Small Engine Projects - Page 2 Img_2114
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AllisKidD21
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AllisKidD21

Age : 21
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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSun Apr 29, 2018 4:11 pm

Looking good so far Matt! Got any specifics on the exhaust plan?

_______________________________________________
"This'll either wake you up or put you to sleep forever!"- Red Green         "Whatever you do you should do right, even if it's something wrong." - Hank Hill
      - MTD Off-Road Build     
      - Ford LT 110 Off-Road Build
      - Craftsman GT 6000 Off-Road Build

  - Allis B-110, 710 & 716 - Wheel Horse 655 & 953 - Case 444 - Bolens Versamatic & 1668 - Cub 106 & 124 - Ford LGT 125 & 145 -
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Double W Cross Ranch
DimeWeld
DimeWeld
Double W Cross Ranch

Age : 16
Join date : 2017-06-09
Posts : 2587
Forum Rep : 84
Location : Literally Nowhere, Texas

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSun Apr 29, 2018 5:15 pm

Yeah, those gaskets usually last as long as the engine does.  Nice work dude!
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MatthewD
Prybar
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MatthewD

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSun Apr 29, 2018 5:20 pm

@AllisKidD21 wrote:
Looking good so far Matt! Got any specifics on the exhaust plan?
Thanks Allis! I could run a gutted out 3.5hp exhaust, or I might leave the exhaust until I figure out what the engine is going onto.
@Double W Cross Ranch wrote:
Yeah, those gaskets usually last as long as the engine does.  Nice work dude!
Thanks W!

Stripped the carb down. It was surprisingly clean after sitting in a dusty shed for years but I thought I would clean it up really good anyway. 
My Small Engine Projects - Page 2 Img_2116
'W' for Walbro!
My Small Engine Projects - Page 2 Img_2118
Going to boil the bowl, carb body, jets in water and vinegar to clean them up sparkling.
My Small Engine Projects - Page 2 Img_2117


Last edited by MatthewD on Sun Apr 29, 2018 5:31 pm; edited 1 time in total
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Double W Cross Ranch
DimeWeld
DimeWeld
Double W Cross Ranch

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeSun Apr 29, 2018 5:22 pm

It's probably Walbro, but maybe 'M' for mikuni?
naw that ain't a mikuni....
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MatthewD
Prybar
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MatthewD

Age : 19
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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeMon Apr 30, 2018 5:47 pm

It's definitely a Walbro. I know Tecumseh used Walbro carbs a lot.

Boiled the carb in water and vinegar today, outdoors style!
My Small Engine Projects - Page 2 Img_2119
My Small Engine Projects - Page 2 Img_2120
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Crazy_Carl
BoogerWeld
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Crazy_Carl

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeMon Apr 30, 2018 6:01 pm

This is a very interesting technique.  I'm so used to using aerosol carb cleaner and compressed air because it's quick, effective, and cheap.  However this method won't cost you really anything.
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MatthewD
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MatthewD

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeMon Apr 30, 2018 6:09 pm

Yeah, compressed air and carb cleaner work well, but I find the movement of the water when boiling helps to shift dirt that is really stuck on or really gummed up carbs. This carb didn't really need boiling but I thought I'd do it anyway. Will build up the carb tomorrow.
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Double W Cross Ranch
DimeWeld
DimeWeld
Double W Cross Ranch

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeMon Apr 30, 2018 8:10 pm

Hmm...I may do this to my John Deere carb, it's so stuck that the butterflies won't even budge with vice grips.
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AllisKidD21
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AllisKidD21

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeMon Apr 30, 2018 9:26 pm

I'd maybe soak that in some engine oil or something first. That'd probably free it up and then you could clean it all out afterwards.

_______________________________________________
"This'll either wake you up or put you to sleep forever!"- Red Green         "Whatever you do you should do right, even if it's something wrong." - Hank Hill
      - MTD Off-Road Build     
      - Ford LT 110 Off-Road Build
      - Craftsman GT 6000 Off-Road Build

  - Allis B-110, 710 & 716 - Wheel Horse 655 & 953 - Case 444 - Bolens Versamatic & 1668 - Cub 106 & 124 - Ford LGT 125 & 145 -
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MatthewD
Prybar
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MatthewD

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeWed May 02, 2018 6:24 pm

Yeah, the boiling trick probably won't free up that carb if it's that badly stuck, I find soaking stuff in ATF helps to loosen things up.
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MatthewD
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MatthewD

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeThu May 03, 2018 3:43 pm

Got the carb all cleaned up and reassembled.
My Small Engine Projects - Page 2 Img_2121
Intake tube made up, the dinging is to allow it to fit between the cylinder head and the coil. The stock one is like this too.
My Small Engine Projects - Page 2 Img_2123
Now here's where things go a little pear shaped. I had intended to weld my new intake tube to the old one, but it turns out it's aluminium, and I can't weld to it with my arc welder. 
My Small Engine Projects - Page 2 Img_2122

So I think it might be better to use a carb/tank combo that normally comes on these engines but with some mods to allow it to run better.

I then decided to do some work on the lawn mower as the rough grass I need to cut with it is growing fast!
Pulled her out of the garage yesterday and laid all the parts out on the ground, she was pretty dusty and there was a slight bit of damp round it. 
My Small Engine Projects - Page 2 Img_2124
My Small Engine Projects - Page 2 Img_2125

All reassembled. Put the cylindrical muffler back onto it because I think it suits the mower better. I put some fuel in it and she fired up and ran great after adjusting the carb. The carb probably needs a new carb kit (it's the older style auto choke carb) as it's missing the little spring in the diaphragm so the operation of the choke is slower than normal
My Small Engine Projects - Page 2 Img_2126
However, I couldn't fit the blade because the crankshaft bolt hole is a little... shall we say messed up? 
My Small Engine Projects - Page 2 Img_2127
Alright, I'll confess it was me Embarassed When I got the engine a few years ago, the shaft was really long so I cut it down to the right length but found there was no threads in that piece. So I tried drilling a hole but it didn't turn out too good. The hole isn't even in the centre and it's too large and I can't seem to cut decent threads in it. I was wondering if I could fill the hole with weld and start again? Or would it be too hard to drill/tap threads? Your thoughts would be greatly appreciated My Small Engine Projects - Page 2 2731072446
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Crazy_Carl
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Crazy_Carl

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeThu May 03, 2018 9:00 pm

You should pull the crank, weld it up and take it to your uncles lathe to drill and tap it the right way
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CraftsmanQuad19
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CraftsmanQuad19

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeThu May 03, 2018 9:21 pm

I’d say screw it and weld the blade and adapter to the crankshaft lol
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MatthewD
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MatthewD

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PostSubject: Re: My Small Engine Projects   My Small Engine Projects - Page 2 Icon_minitimeFri May 04, 2018 11:46 am

@Crazy_Carl wrote:
You should pull the crank, weld it up and take it to your uncles lathe to drill and tap it the right way
Good idea, that may be the best solution.
@CraftsmanQuad19 wrote:
I’d say screw it and weld the blade and adapter to the crankshaft lol
I'm sure there's a better solution haha. I'd like to be able to remove the engine if I need to CQ.
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