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Vintage Jacobsens are certainly an oddity in their own right and offer unique designs that are not seen in most other machines of the same era.

Do you enjoy working on the two cycles more than the 4 strokes, or no preference?
 

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My fiance mostly works on them for me or let's me take out bolts. But he promised to teach me how to fix my own stuff soon.
 

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Jakes are such neat mowers and having them find you is a good thing! What models do you have there, and do you know the years they were manufactured?
 

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Jakes are such neat mowers and having them find you is a good thing! What models do you have there, and do you know the years they were manufactured?
Ill lend some assistance to lawn queen here. There are two lawn queens, a pacer, two lawn kings, a park 30 and I believe a manor not sure the model number. I have no idea on the years. I have to be honest, I didn't know there were so many people into these, and I didn't know of any way other than some of them with briggs or Wisconsin's on how to date them? This is some what new to me. Im out of my knowledge zone. But im more than willing to learn.
 

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Thought I seen a Park 30 in there. I have one with the two extra reels to make it larger cut. Would like to find the steerable sulky for it. Thanks for the pics! :)
 

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Ill lend some assistance to lawn queen here. There are two lawn queens, a pacer, two lawn kings, a park 30 and I believe a manor not sure the model number. I have no idea on the years. I have to be honest, I didn't know there were so many people into these, and I didn't know of any way other than some of them with briggs or Wisconsin's on how to date them? This is some what new to me. Im out of my knowledge zone. But im more than willing to learn.
That's fantastic! What a neat collection. I think it's wonderful that you both have taken an appreciation for these unique mowing machines. :)

To look up the year of a vintage Jacobsen, this site is the place to go: Hit & Miss Model's Jacobsen serial number lookup for products made before 1975
 

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I have to be honest, I didn't know there were so many people into these
Let's just say, "I love the smell of two stroke in the morning.":2th: My biggest problem is that I don't have enough room to keep everything.

Besides the web site that Austen mentioned, the fine folks at Jacobsen/Textron have been very helpful in providing information from their archives. I've contacted them a number of times through their customer support system, and they have actually added some vintage models, like you have, to their list of online manuals. You'll find the Lawn King, Lawn Queen and Lawn Prince parts manuals here under the "Models Out of Production" drop down menu.

Jacobsen - Renowned for Turf Maintenance Solutions
 

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I have a question for you all. The lawn queen on the far right. It has an interesting fuel system. We have not got this one running yet. The tank is below the carb. And it has two line in it. One going to the carb and one coming out of the crank case. Is this a pressurized fuel system? I have no idea what exactly im looking at. Never seen one with this kind of a set up.
 

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I have a question for you all. The lawn queen on the far right. It has an interesting fuel system. We have not got this one running yet. The tank is below the carb. And it has two line in it. One going to the carb and one coming out of the crank case. Is this a pressurized fuel system?
That's exactly what it is, a crankcase pressurized fuel system. Definitely a different design that is not quite as simple as the gravity fed style.


I don't have any firsthand experience with this particular style fuel system on these engines, however I am going to quote Andrew Mackey from SmokStak who is more knowledgeable about it.

" A tapping is made into the top of the engine crankcase. A 90 degree ell with a check ball is installed, with the check keeping pressure in the tank from returning to the engine block. The 1/4" copper tubing leads to a tee installed in the top of the tank. The top of the tee has a check ball, loaded with a spring and a screw on top, and is vented to the atmosphere. The screw adjusts spring pressure. The assembly acts as a relief valve for excess pressure in the tank. The bottom connection connects the fuel to the carb, where a cork float determines fuel level in the carb."
 

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Hey Austen, remember that guy that showed up with a Lawn King that he tricked out with wide tires and chromed wheels over on the Jacobsen group? He had that system on his LK, and as I remember, he did a pretty good write up on it.


Found it! Here's how he described that system back in 2011.

"The "fuel pump" consists of a spring-loaded ball check valve, which allows pressure from the crankcase to enter the top of the fuel tank, via a second, adjustable, check valve, which acts as a fuel pressure regulator. That's right, adjustable fuel pressure, as long as the check valves function, the fuel cap seals properly"

I hope that helps you out with yours Bob.
 

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Hey Austen, remember that guy that showed up with a Lawn King that he tricked out with wide tires and chromed wheels over on the Jacobsen group? He had that system on his LK, and as I remember, he did a pretty good write up on it.




I do remember, he had a one of a kind vision for the LK for sure. I remember that he ended up listing it for sale but I don't know if he sold it or not. Do you?

RE the fuel system, he did have a nice explanation of it. He had to make a new cork float and replace some of the spring(s) and check ball(s) due to corrosion I think.

What we're referring to, in case you're both wondering, is a Jacobsen specific group on Yahoo. It's not very active but it has some good information in the archives, database and a cool photo gallery. Here's the link if you'd like to join. https://groups.yahoo.com/neo/groups/jacobsenequipment/info
 

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That's the one. Never did know if he actually sold it or not.

Hope Bob and Lawn Queen get that one of theirs up and running soon.
 
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