Replaced engine on my PT422

cqaigy2 · Jul 28, 2018

woodlandfarms said:
God you guys are mean to me.

Geeze no kidding lay off already!

Carl can't help being the way he is.

ponytug · Jul 30, 2018

Hey: It is great having here!

woodlandfarms said:
God you guys are mean to me.

ernemats · Aug 2, 2018

Started taking engine out of my 422 today , done with the easy stuff now to tackle the harder things I think. Found something that could have been bad, the positive cable from the battery to the starter had all the coating rubbed off several places and the copper wire was showing, glad I caught that before something bad happened. Trying to figure out how to get the engine mounting bolts loose , one looks like it is going to be real hard, (under starter) the others look not quite so hard.

BobRip · Aug 3, 2018

ernemats said:
Started taking engine out of my 422 today , done with the easy stuff now to tackle the harder things I think. Found something that could have been bad, the positive cable from the battery to the starter had all the coating rubbed off several places and the copper wire was showing, glad I caught that before something bad happened. Trying to figure out how to get the engine mounting bolts loose , one looks like it is going to be real hard, (under starter) the others look not quite so hard.

I got that bolt partly from the oil drain access hole. It helped to have a second person. I think I reached from the front of the engine with my left hand to get to the top of the bolt.

ernemats · Aug 3, 2018

Got all the bolts except that one , cannot keep wrench on top of bolt to keep from spinning. I did like you said reach the nut on the bottom through the oil drain access hole . My son tried to hold wrench on bolt top but it kept slipping off . Bolt is loose but cannot get nut off completely. Did you have to slide engine forward to get rear pump free of motor?

BobRip · Aug 3, 2018

ernemats said:
Got all the bolts except that one , cannot keep wrench on top of bolt to keep from spinning. I did like you said reach the nut on the bottom through the oil drain access hole . My son tried to hold wrench on bolt top but it kept slipping off . Bolt is loose but cannot get nut off completely. Did you have to slide engine forward to get rear pump free of motor?

Not sure. I don稚 think so. It did not take much engine movement to clear it. I think the nuts on the engine bolts are nylock.

ernemats · Aug 3, 2018

Its out and what a mess 19 years of crud built up even though it was cleaned out often. Going to clean it out as best I can and then decide what I am going to do for a replacementView attachment 565399 View attachment 565400

BobRip · Aug 3, 2018

ernemats said:
Its out and what a mess 19 years of crud built up even though it was cleaned out often. Going to clean it out as best I can and then decide what I am going to do for a replacementView attachment 565399 View attachment 565400 View attachment 565401 View attachment 565402

Mine was a mess too. I vacuumed, used compressed air and then a garden hose. Still not perfect.

Do you not have a new engine yet?

ernemats · Aug 3, 2018

I have another 22 hp Robin that I purchased used years ago for parts or a backup. I have not decided if I want to put it in or not. I used the 2 ignition coils off it on the engine I just took out so I would have to replace them and they are not cheap. I am not sure how many hours on the replacement engine and if sitting in my garage for probably 10 years could have any ill effects on it. I do not want to put it in and find out it is no good or subpar.

Marks481 · Aug 4, 2018

(since it's not my money) Go Big or Go home!

I would at least drop in a 25hp... or bigger. Field mowing with my PT422 is a royal pain 'cause not enough power.

BobRip · Aug 4, 2018

tmarks11 said:
(since it's not my money) Go Big or Go home!

I would at least drop in a 25hp... or bigger. Field mowing with my PT422 is a royal pain 'cause not enough power.

It was not available for my tractor. Check with Terry. I would have loved to have the extra horsepower.

agjones · Aug 5, 2018

The Hondas and clones are a good match... The 670 is good or 690 for a bit of an upgrade.

BobRip · Aug 31, 2018

There is some machining done on the back of the engine that allows the pumps to bolt on. My guess is it was done by Power Trac. Anybody else notice this?

ernemats · Sep 23, 2018

Bob did you cut your blower housing in half like you did on your old engine? If so where and how did you cut it and fasten it on

BobRip · Sep 24, 2018

ernemats said:
Bob did you cut your blower housing in half like you did on your old engine? If so where and how did you cut it and fasten it on

I did cut it. I cut horizontally across at the engine shaft center line. I used the existing bolts to hold it in place. I can now get in there and clean the engine. I used a spiral bit on my Dremel tool. Not hard to cut.

ernemats · Oct 15, 2018

I never took notice of my motor location in the tub on my old engine, but my new engine sits off center a little bit, the side where the starter is located is almost touching the tub wall and the rear pump is slightly off center also. Do I have the motor mounted wrong or is that common with the older 422's? I measured the platform that the motor sits on and it is also not exactly centered. I did not remove the platform or loosen its bolts so I don't think it moved any.

BobRip · Oct 16, 2018

I will try to check later today.

BobRip · Oct 17, 2018

I noticed the same offset on my engine. The starter side is about one inch between the engine and side and the other is about 2 inches.

Barryh · Nov 23, 2018

ernemats said:
Bob did you cut your blower housing in half like you did on your old engine? If so where and how did you cut it and fasten it on

Great job Bob on the engine replacement. :thumbsup: I am getting ready to cut away my housing wondering if you have a picture of yours with the cut away. I am replacing the ignition module's on my Kohler 25.