Bought a R7070 -- Key Word "Yellow"

[2smoked]

Because I live in Wisconsin, my R7070 mower attracts Green Bay Packers fans. I personally identify the colors with John Deere products.

 

[Jack17]

This is why your lawn mower burns oil and cuts grass all crooked!!!
Nobody like Green Bay anyway!

Go Bears!

 

[Two-Stroke]

Because I live in Wisconsin, my R7070 mower attracts Green Bay Packers fans. I personally identify the colors with John Deere products.

I thought of John Deere products when I saw the color combo of the R7070. The yellow is that same canary yellow and the two greens are fairly close. But apparently there's no LB-JD tie-in as far as I can tell.

Aren't the Green Bay colors green and gold?

 

[2smoked]

This is why your lawn mower burns oil and cuts grass all crooked!!!
Nobody like Green Bay anyway!

Go Bears!

............carefull..........careful.............

 

[rarebear]

Snapper's were made in McDonough, Ga, a town over from where I live..

 

[Two-Stroke]

My R7070 has a leak in the gas tank.

I hope I'll be able to fix it with JB Weld or something like that. It's a slow leak and it's high on the tank.

So now I'm on a mission.

The mower runs like a champ -- it passed the "wet, high grass" test.

 

[jp1961]

Is the tank separate from the engine cover or integral? Is the tank polyethylene?, if so, not much sticks to it. If the crack is visible and accessible, I might try to 'weld' it using a soldering iron. As far as J.B. weld, I would try a thick variety of super glue available at hobby shops for R/C airplanes first, before I would use J.B. weld.

Snapper made a great lawnmower too, I have a 1986 self propelled model with a Tecumseh two stroke on it. It doesn't run as well as my L.B. 10323, but it always starts on the first pull and runs decent enough to mow with. Down side to the Snapper is they are heavy, much more than my 10323.

Jeff

 

[2smoked]

My R7070 has a leak in the gas tank.

I hope I'll be able to fix it with JB Weld or something like that. It's a slow leak and it's high on the tank.

So now I'm on a mission.

The mower runs like a champ -- it passed the "wet, high grass" test.

I think this is a common problem on Lawn Boys with this style of shroud. I have the R7070 and a 5247 and both of them leak at the plastic welded seam. I think that age and vibration has a lot to do with it. I have tried just about everything from re-welding the affected area of the seam, to products like Seal All and JB Weld. On each one, the leak would eventually return. On the 5247, I just gave up and attached an auxillary tank. I wasn't into the LB collecting thing at the time so the appearance did not bother me. I just wanted to continue using the mower. When I found the same problem on the R7070, I tried Seal All because someone else said that it was the best. I thoroughly cleaned the leak area before applying in and it worked well----for a while. I never tried any type of internal tank sealant and am not sure if there are any that would work with plastic tanks and I am not sure it would be worth the bother. Finding a good, non-leaking, used shroud may be the best solution but finding a nice one for a yellow model could be daunting and pricey.

I enjoy using both mowers, but with the R7070, I solved the problem by not filling the tank all the way. If you look at where the seam is, you will notice that it is very close to the shroud top. My city lot is fairly large, has no hills, and I rarely have to stop and refill. That works for me.
I also have two older LB's (8255 & 7260G) that have what I call the plastic "tombstone" shroud. Neither one of these leaks----yet.

 

[Two-Stroke]

Is the tank separate from the engine cover or integral? Is the tank polyethylene?, if so, not much sticks to it. If the crack is visible and accessible, I might try to 'weld' it using a soldering iron. As far as J.B. weld, I would try a thick variety of super glue available at hobby shops for R/C airplanes first, before I would use J.B. weld.

Snapper made a great lawnmower too, I have a 1986 self propelled model with a Tecumseh two stroke on it. It doesn't run as well as my L.B. 10323, but it always starts on the first pull and runs decent enough to mow with. Down side to the Snapper is they are heavy, much more than my 10323.

Jeff

Thanks for the info.

The tank is built into the shroud (which covers the engine). The bottom part of the tank (about 90% of its volume) is somehow bonded to the top part of the tank which I think was moulded as one piece with the shroud.

I Googled "adhesives for polyethylene" and found some encouraging results. Short answer: it's difficult but do-able. The first thing that popped up on the search was Poly-Weld by Tap Plastics.

Another link from the search brought me to a discussion on Google groups -- quote from that group:

Q: How can you glue polyethylene or polyproplyene?

A: PE and PP are hard to glue because they have "low surface energy".
Very crudely, they have little interest in sticking to anything
else, including adhesives. One technique that works is to apply
a chemical "surface activator" then use cyanoacrylate adhesives
("superglues"). Until recently, surface activators were not
marketed for retail, although anyone could buy small quantities
from a Permatex distributor like a bearing or power transmission
industrial supply house, or from similar sources.

Recently, the Locktite brand has started retail marketing of a
product called "Plastix" that is a kit of surface activator and
compatible cyanoacrylate adhesive. The literature for Plastix
indicates it is suitable "even for" PE and PP.

I still don't know the best way to do this but using a soldering iron isn't an option since the leak is very close to the side of the shroud.

BTW, a Snapper with a two-cycle engine has been on my wish list for a long time. I think they also made one with a Wisconsin-Robin two-stroke.

 

[Two-Stroke]

I think this is a common problem on Lawn Boys with this style of shroud. I have the R7070 and a 5247 and both of them leak at the plastic welded seam. I think that age and vibration has a lot to do with it. I have tried just about everything from re-welding the affected area of the seam, to products like Seal All and JB Weld. On each one, the leak would eventually return. On the 5247, I just gave up and attached an auxillary tank. I wasn't into the LB collecting thing at the time so the appearance did not bother me. I just wanted to continue using the mower. When I found the same problem on the R7070, I tried Seal All because someone else said that it was the best. I thoroughly cleaned the leak area before applying in and it worked well----for a while. I never tried any type of internal tank sealant and am not sure if there are any that would work with plastic tanks and I am not sure it would be worth the bother. Finding a good, non-leaking, used shroud may be the best solution but finding a nice one for a yellow model could be daunting and pricey.

I enjoy using both mowers, but with the R7070, I solved the problem by not filling the tank all the way. If you look at where the seam is, you will notice that it is very close to the shroud top. My city lot is fairly large, has no hills, and I rarely have to stop and refill. That works for me.
I also have two older LB's (8255 & 7260G) that have what I call the plastic "tombstone" shroud. Neither one of these leaks----yet.

Thanks for the reply and I'm sorry to hear that your R7070 has the same problem (mine also leaks at the seam). But I do believe there is a solution to this -- have you read my previous post?

I'm not sure what to try first but I'm leaning toward Tap Poly-Weld.