PDA

View Full Version : 25 or 23 HP Kawasaki Engine FH721 or FH680 pics of Rebuild all the way through.


teckjohn
01-16-2013, 04:19 PM
Just got several Kits in and am building 4 engines and will post pics of the build all the way through. Stay Tuned. And I will take good pics of the hash marks so slapper will be happy.
25 or 23 HP Kawasaki Engine FH721 or FH680
Because of all the calls on kits I put one together.
They will work for the FH721D FH680D or FH721V FH680V
Have to call me to make sure I send the right gasket
http://zeroturnman.com/kitprice.jpg

Engine Kit cost $155.00

piston slapper
01-17-2013, 09:45 AM
Hmmm....no pics yet..????
As a former Kawasaki Dealer...all I see is about $90 worth of parts...
As a currently certified Kohler Expert Technician...I can't wait to see these engine builds...
Can't wait to use the Zoom feature on my new toy...

D C
01-17-2013, 12:10 PM
Cool! Looking forward to the rebuilds. I have a 680V that I'm planning to rebuild before mowing season, so I'm definitely interested in how it goes.

What all are you expecting to do and/or replace with the rebuild?
Gaskets obviously, but what else? Pistons, bearings, bushings, etc...?

pugs
01-17-2013, 12:48 PM
Hmmm....no pics yet..????
As a former Kawasaki Dealer...all I see is about $90 worth of parts...
As a currently certified Kohler Expert Technician...I can't wait to see these engine builds...
Can't wait to use the Zoom feature on my new toy...

If he is using Standard size rings...they are double the price of the oversize rings for some reason. Just got some for a customer...both standard and oversized. The oversized were 30 per set, while the standard were 60 per set MSRP. I called Kawasaki to ask about it but got nowhere with that. So standard rings for a single engine are 120 alone.

piston slapper
01-17-2013, 01:28 PM
If he is using Standard size rings...they are double the price of the oversize rings for some reason. Just got some for a customer...both standard and oversized. The oversized were 30 per set, while the standard were 60 per set MSRP. I called Kawasaki to ask about it but got nowhere with that. So standard rings for a single engine are 120 alone.

That changes my equations....
Guess they figger that if Kohler can get $60 for a set of rings...they can too...:dizzy:

teckjohn
01-17-2013, 03:19 PM
http://zeroturnman.com/25hp/jdprice.jpg
http://zeroturnman.com/25hp/IMG_0090.JPG
http://zeroturnman.com/25hp/IMG_0091.JPG
http://zeroturnman.com/25hp/IMG_0092.JPG
http://zeroturnman.com/25hp/IMG_0093.JPG
http://zeroturnman.com/25hp/IMG_0094.JPG
http://zeroturnman.com/25hp/IMG_0095.JPG
http://zeroturnman.com/25hp/IMG_0096.JPG
http://zeroturnman.com/25hp/IMG_0097.JPG
http://zeroturnman.com/25hp/IMG_0098.JPG
http://zeroturnman.com/25hp/IMG_0099.JPG

teckjohn
01-17-2013, 03:30 PM
http://zeroturnman.com/25hp/parts.jpg

piston slapper
01-17-2013, 03:57 PM
Just some constructive observations....
NEVER use a high speed die grinder to clean aluminum blocks...
It dishes the aluminum...causing headgasket leaks and sump leaks..
If the block gets dished badly...the block will be junk...unusable....

The reason I point this out is that over the years ...many customers have called on me to straighten out poorly rebuilt engines...
They figured that they could save money by getting it done by a novice engine builder..then they bring it to me..
More often than not...it was a waste of my time and their money...the block gouged beyond repair..

rjtlawncare
01-17-2013, 04:12 PM
If you could make some video's of the rebuild's. Video's Rock !!!:cool2:

Restrorob
01-17-2013, 07:12 PM
http://i107.photobucket.com/albums/m314/Restrorob/Misc%202/Cart.jpg







....... http://www.iol.ie/~gtir/misc/food/popcorn.gif .......

teckjohn
01-17-2013, 07:17 PM
we can give it away at cost, dont really matter to me. And never have had a come back.

piston slapper
01-17-2013, 08:10 PM
Question....
The crosshatches are a little weak...
What process did you use to create them..???

A)...crosshatching sandpaper..
B)....ball hone..
C)...spring hone..
D)...sharpening stone
E)...none of the above..

Also...how did you clean the block after crosshatching it..???

teckjohn
01-17-2013, 08:31 PM
Here is cost on the kit! Its for 3 kits. So around $101 each

http://zeroturnman.com/cost.jpg

teckjohn
01-17-2013, 08:35 PM
E is the answer

Dave
01-17-2013, 08:43 PM
I hope your motor turns out well for you and runs for a long time, Im courious how many hours does it have on it

piston slapper
01-17-2013, 08:45 PM
E is the answer

Hmmmm....so I guess there was no need to properly clean the block..???
Since you didn't use your crosshatching sandpaper..???

teckjohn
01-17-2013, 08:46 PM
Lisle 16000 Small Cylinder Hone was used

http://zeroturnman.com/25hp/DSC08192.JPG
http://zeroturnman.com/25hp/DSC08193.JPG
http://zeroturnman.com/25hp/DSC08194.JPG
http://zeroturnman.com/25hp/DSC08195.JPG
http://zeroturnman.com/25hp/DSC08196.JPG
http://zeroturnman.com/25hp/DSC08197.JPG
http://zeroturnman.com/25hp/DSC08198.JPG
http://zeroturnman.com/25hp/DSC08199.JPG
http://zeroturnman.com/25hp/DSC08200.JPG
http://zeroturnman.com/25hp/DSC08201.JPG
http://zeroturnman.com/25hp/DSC08202.JPG
http://zeroturnman.com/25hp/DSC08203.JPG

piston slapper
01-17-2013, 09:00 PM
Perhaps...if you knew what you were trying to accomplish...you might be able to properly crosshatch a cylinder..
Those cylinders look rough...with no particular pattern..they will definitely shorten the life of the new rings..

I could see it if you were building an engine for yourself....but...you are building these engines for paying customers..
The worst part is that you think these pictures are good examples of proper engine work..

Dave
01-17-2013, 09:20 PM
Did you run a cylinder bore guage down the cylinders before honing them? was the crank mic?? IMO unless the engines do not have that many hours on them. I would change them instead of rebuild them. In time they all end up with slop in the carb thottle shafts, (200+) kawi's are known for valve guide issues , with no oversize guide (100+ head only , no valves etc) etc etc. new manufacture warrenty instead of ????? most of the older engines were worth doing as buying new was expensive, there were less or no epa so one could adjust a carb. and like everything else back then , were just made better. this is my opinion

djagusch
01-17-2013, 09:31 PM
Perhaps...if you knew what you were trying to accomplish...you might be able to properly crosshatch a cylinder..
Those cylinders look rough...with no particular pattern..they will definitely shorten the life of the new rings..

I could see it if you were building an engine for yourself....but...you are building these engines for paying customers..
The worst part is that you think these pictures are good examples of proper engine work..

What's your opinion on a ball hone used on a power drill? Local dealer hear does it that way and looks decent when done.

piston slapper
01-17-2013, 09:42 PM
Ball hone puts a nice finish on the cylinders...if used properly...
I still use my 2 4 in spring hones...120 and 400 grit stones..
The spring hones give a true read on the cylinder walls...where as the ball hone scratches everything..
I get the crosshatch close with the 120 grit...and finish the crosshatch with the 400 grit..
This allows the rings to seat without roughing up the new rings...and also provides excellent oil control.

Landrus2
01-17-2013, 09:46 PM
Hey teckjohn.
In my opinion that is great work.

teckjohn
01-17-2013, 10:46 PM
Im just trying help guys make it and keep them from the PARTS Changers!!

joe billy
01-18-2013, 03:57 PM
Im just trying help guys make it and keep them from the PARTS Changers!!

Looks like I missed the fireworks again.
There aren't too many hacks or parts changers that dare post in this forum.
Just who are you referring to ?

laman
01-18-2013, 09:41 PM
I built a 383 stroker motor for a street stip car final honing was done with 600 grit hone at machine shop. Honing I've seen here looks a little rough for new rings...

piston slapper
01-18-2013, 10:13 PM
I built a 383 stroker motor for a street stip car final honing was done with 600 grit hone at machine shop. Honing I've seen here looks a little rough for new rings...

Sounds like you found a machine shop that knows their way around the inside of an engine.
I did not invent the 2 hone crosshatching method...it was taught to me by a master engine builder.
There is a lot of horsepower hiding inside an engine...reducing friction is a good place to start.

Landrus2
01-19-2013, 03:07 PM
Sounds like you found a machine shop that knows their way around the inside of an engine.
I did not invent the 2 hone crosshatching method...it was taught to me by a master engine builder.
There is a lot of horsepower hiding inside an engine...reducing friction is a good place to start.

Let's start over with respect now :weightlifter:

Michael J. Donovan
01-19-2013, 03:11 PM
ok guys, time to move on and please refrain from personal attacks towards one another

thanks, we would appreciate it :waving: