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Old Girl 1978 Roper


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#406 larrybl ONLINE  

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Posted March 13, 2015 - 06:15 PM

Almost done with the teardown. Everything looks amazing! no scuffing anywhere. I'll work on getting some measurements now. Oh, I need to locate a carb kit and a set of points.

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#407 larrybl ONLINE  

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Posted March 13, 2015 - 10:18 PM

Not sure I posted this picture it was taken right after I first started the engine. I have been looking for a carb kit for the Walbro carb ever sense. I haven't had any luck so...... I found a new carb on eBay for $208.00, felt that was fair so I ordered it. (Now all the rebuild kits will show up). I found a set of points at Onan.com but I am holding on those till I find the correct ring part numbers so I can order these all at once. I bought a new 6" caliper set that measures to 0.001 and measured the top bore at 3.554, Top and center ring width is 0.080, and the oil ring width is 0.190. I will still take the block to a shop to have the cylinders honed and specked. I plan on taking the tires to a shop tomorrow to be broke down so I can start working on the rims.
 

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#408 larrybl ONLINE  

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Posted March 14, 2015 - 12:37 PM

Well, the tractor budget went a little over this payday. I had the tires broke down, and picked up a new oil filter and valve stems. Tried to order a STD ring set off of ONAN.com but they only have one set available. I emailed them and asked to notify me when they get another set.  

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#409 larrybl ONLINE  

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Posted March 14, 2015 - 09:00 PM

Grandson removed the old valve stems, and I started on de-carbon of the valves and pistons. small "new" dermal heated up so I worked on the engine tins till it chilled down (60*). Interesting fuel pump, two inlets and two outlets. One side is capped. wonder if this is original?  watching TV now.

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#410 UncleWillie OFFLINE  

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Posted March 14, 2015 - 09:51 PM

I have never seen a pump with more than one outlet. Maybe you are supposed to have a twin carb!

Picture-104.png


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#411 larrybl ONLINE  

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Posted March 14, 2015 - 10:35 PM

Or two gas tanks, and allow switching between them. hmmmmm. even though this one appears fine, I am sure the Briggs pumps would work on this too.


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#412 KennyP ONLINE  

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Posted March 15, 2015 - 05:15 AM

The only thing I don't like about vacuum pumps is if the tank is under the seat, you can have a longer crank time to get fuel to the carb.


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#413 larrybl ONLINE  

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Posted March 15, 2015 - 10:22 AM

Kenny, I am not against upgrading her to an electric pump, any recommendations? 



#414 KennyP ONLINE  

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Posted March 15, 2015 - 10:32 AM

As long as it is a low PSI unit. I bought several from one person a while back and 3 have failed already. So I don't know which one's are the best to get. I had one from NAPA before these and it didn't last long either.


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#415 larrybl ONLINE  

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Posted March 15, 2015 - 11:34 AM

Electric pump doesn't sound like an upgrade I want right now.


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#416 TAHOE ONLINE  

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Posted March 15, 2015 - 01:56 PM

The FP on my 18 HP Onan looks identical to that one, 4 ports with one plugged


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#417 larrybl ONLINE  

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Posted March 15, 2015 - 02:48 PM

The FP on my 18 HP Onan looks identical to that one, 4 ports with one plugged

Mine has an "in" and "out" plugged, maybe one of yours fell off? Could be in case of a pump fail you can swap ports?



#418 larrybl ONLINE  

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Posted March 16, 2015 - 09:24 PM

Talked with my neighbor this weekend, he will weld the brackets on the deck grass deflector, and weld nipples on the exhaust pipes (plan B) Sending the check off for plan A in the morning. New carb from epay has shipped. Neighbor couldn't measure the bore, so I decided to remove the oil pump, cam, and crank. This will make the seal replacement easier later on. This one gear took some persuasion but got it off. Block will go to the machine shop and get honed and measured now.

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#419 larrybl ONLINE  

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Posted March 17, 2015 - 12:25 PM

The block was dropped off at the machine shop this morning, they said they will call me this afternoon when it is ready. I asked to have it cleaned up, honed, and the bore measured so I can make sure I get the correct ring set. Hope to post a couple pictures this evening.


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#420 larrybl ONLINE  

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Posted March 18, 2015 - 09:08 PM

Block is back from the shop, the machine shop said I need the STD ring set. They honed and cleaned up the intake and exhaust ports for $30.00. Hoping to hear from Onan.com on availability of one more ring set. Anyone want to guess as to what the extra cam lobe is for?

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