Only Cub Cadets

PLEASE PATRONIZE OUR SPONSORS!

CC Specialties R. F. Houtz and Sons Jeff in Pa.

P&K Cub Cadet Machtech Direct

Cub Cadet Parts & Service


If you would like to help maintain this site & enhance it, feel free to donate whatever amount you would like to!




Attention Everyone, we have 2 new Sponsors!
Machtech Direct and P&K Cub Cadet (See Links above)


Go Back   Only Cub Cadets > Cub Cadets > Cub Cadet Engines > Onan Engines
Reload this Page Not a Cub Onan, but a MF 1855 B48M
Register FAQ Calendar

Notices

Reply
 
Thread Tools Display Modes
  #1  
Old 03-28-2020, 10:29 PM
EarlJ's Avatar
EarlJ EarlJ is offline
Senior Member
  
Join Date: Mar 2012
Location: Easley, SC
Posts: 520
Default Not a Cub Onan, but a MF 1855 B48M
Ok guys, hopefully someone here can help. I've asked in the onan forum on fb but no resolve. This engine is on my snapper/massey ferguson 1855. The engine is a b48m that I freshened up. New rings and gaskets, valve job, surfaced the heads. I'm linking the video on facebook so that you guys can hear what it's doing. Now since making the vid, I've reset the float, installed new intake gaskets, sprayed from here to doomsday for vac leaks none found.
Additionally, I swapped the plug wires around on the coil but no change. I checked the valves while running and they are moving freely and in spec. That weird part is the drivers side exhaust is way colder than the passenger side, in fact I can grab the drivers side no problem, the pass literally blistered my hand in an instance.

https://m.facebook.com/groups/831304...93702804052438
__________________
126 in surgery with weights, spring assist, 3 point and sleeve hitch
100 with woods finish mower and rear lift,
Nice 125 with super nice sweepster, 1782 Super Diesel,
1650,782D in surgery, 102 parts tractor..
3 Brinley plows, Brinley cultivators , rear scrape blade, front plows and custom built bedder attachment.
Reply With Quote
  #2  
Old 03-29-2020, 10:27 AM
cooperino's Avatar
cooperino cooperino is offline
Grand Member
  
Join Date: Dec 2015
Location: New York
Posts: 3,065
Default
Quote:
Originally Posted by EarlJ View Post
Ok guys, hopefully someone here can help. I've asked in the onan forum on fb but no resolve. This engine is on my snapper/massey ferguson 1855. The engine is a b48m that I freshened up. New rings and gaskets, valve job, surfaced the heads. I'm linking the video on facebook so that you guys can hear what it's doing. Now since making the vid, I've reset the float, installed new intake gaskets, sprayed from here to doomsday for vac leaks none found.
Additionally, I swapped the plug wires around on the coil but no change. I checked the valves while running and they are moving freely and in spec. That weird part is the drivers side exhaust is way colder than the passenger side, in fact I can grab the drivers side no problem, the pass literally blistered my hand in an instance.

https://m.facebook.com/groups/831304...93702804052438
How much compression on dead cylinder?
__________________
Cooperino 100, 104,125, 126, 2x129's, 804, 1211, 1641
Reply With Quote
  #3  
Old 03-29-2020, 08:58 PM
EarlJ's Avatar
EarlJ EarlJ is offline
Senior Member
  
Join Date: Mar 2012
Location: Easley, SC
Posts: 520
Default
It's not dead per-se just cooler. Its firing, the cylinder is just cooler. I haven't done a compression check yet, can't locate my gauge...
__________________
126 in surgery with weights, spring assist, 3 point and sleeve hitch
100 with woods finish mower and rear lift,
Nice 125 with super nice sweepster, 1782 Super Diesel,
1650,782D in surgery, 102 parts tractor..
3 Brinley plows, Brinley cultivators , rear scrape blade, front plows and custom built bedder attachment.
Reply With Quote
  #4  
Old 03-29-2020, 09:21 PM
cooperino's Avatar
cooperino cooperino is offline
Grand Member
  
Join Date: Dec 2015
Location: New York
Posts: 3,065
Default
Quote:
Originally Posted by EarlJ View Post
It's not dead per-se just cooler. Its firing, the cylinder is just cooler. I haven't done a compression check yet, can't locate my gauge...
Ok.. a temp check then?? Maybe the Hot cylinder is the issue? Need more info. Blister VS cool is kinda vague.
__________________
Cooperino 100, 104,125, 126, 2x129's, 804, 1211, 1641
Reply With Quote
  #5  
Old 03-29-2020, 09:33 PM
ol'George's Avatar
ol'George ol'George is online now
Grand Member
  
Join Date: Oct 2009
Location: MI
Posts: 6,695
Default
You should sizzle steak on the exhaust manifold on both sides.
Clearly the cool side is not producing power.
what color is the plug? fouled,wet? ????
something is not right on the cool side.
Reply With Quote
  #6  
Old 03-29-2020, 09:33 PM
green407's Avatar
green407 green407 is offline
Member
  
Join Date: Jan 2020
Location: Middlesex County, Ontario
Posts: 95
Default
Quote:
Originally Posted by EarlJ View Post
It's not dead per-se just cooler. Its firing, the cylinder is just cooler. I haven't done a compression check yet, can't locate my gauge...
If you can hold onto it while the engine is running, it's dead. Maybe a bad plug, got one of the compression rings upside down, damaged head gasket, didn't stagger the rings? Could be anything.
__________________
128 X 2, 129, 149, 1450 x 2
Reply With Quote
  #7  
Old 03-30-2020, 08:12 AM
cooperino's Avatar
cooperino cooperino is offline
Grand Member
  
Join Date: Dec 2015
Location: New York
Posts: 3,065
Default
Quote:
Originally Posted by EarlJ View Post
It's not dead per-se just cooler. Its firing, the cylinder is just cooler.
How do you know its firing? In your video "hard to tell" but it looked like it was missing pretty badly. From what I saw I would say it is not firing. These engine will run on one cylinder. Sometimes will even have enough power to move around pretty well. If you engage the blades at full throttle does it stall the engine? If so theres a real good chance the cylinder is dead as I suspected..

As a side note. George is 100% correct. Both sides should burn your hand on contact. I think you threw me off a little by saying cooler. The temp difference should really be no more than 20 degrees. When you said cooler I assumed it to be just slightly outside that parameter.
__________________
Cooperino 100, 104,125, 126, 2x129's, 804, 1211, 1641
Reply With Quote
  #8  
Old 03-30-2020, 05:47 PM
EarlJ's Avatar
EarlJ EarlJ is offline
Senior Member
  
Join Date: Mar 2012
Location: Easley, SC
Posts: 520
Default
I've pulled the plug and checked for spark, it was beautiful. Now it seems to that the plug is fuel fowling, its wet. Installed a new plug ran a few mins did the same thing. Now I'm of the thought, I'm flooding and that being the long side of the manifold would be the reason it's fowling out. I think maybe I should order a brass float or swap this carb out.
__________________
126 in surgery with weights, spring assist, 3 point and sleeve hitch
100 with woods finish mower and rear lift,
Nice 125 with super nice sweepster, 1782 Super Diesel,
1650,782D in surgery, 102 parts tractor..
3 Brinley plows, Brinley cultivators , rear scrape blade, front plows and custom built bedder attachment.
Reply With Quote
  #9  
Old 03-31-2020, 09:02 AM
cooperino's Avatar
cooperino cooperino is offline
Grand Member
  
Join Date: Dec 2015
Location: New York
Posts: 3,065
Default
Quote:
Originally Posted by EarlJ View Post
I've pulled the plug and checked for spark, it was beautiful. Now it seems to that the plug is fuel fowling, its wet. Installed a new plug ran a few mins did the same thing. Now I'm of the thought, I'm flooding and that being the long side of the manifold would be the reason it's fowling out. I think maybe I should order a brass float or swap this carb out.
OK..Well, that I guess could happen, However, a wet plug can happen from other things. Typically if your flooding an engine like this it effects both cylinders. I would do a compression test before ordering parts.
__________________
Cooperino 100, 104,125, 126, 2x129's, 804, 1211, 1641
Reply With Quote
Reply

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 08:47 PM.

www.onlycubcadets.net - Archive - Top

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.

Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

This website and forum are not affiliated with or sponsored by MTD Products Inc, which owns the CUB CADET trademarks. It is not an official MTD Products Inc, website, and MTD Products Inc, is not responsible for any of its content. The official MTD Products Inc, website can be found at: http://www.mtdproducts.com. The information and opinions expressed on this website are the responsibility of the website's owner and/or it's members, and do not represent the opinions of MTD Products Inc. IH, INTERNATIONAL HARVESTER are registered trademark of CNH America LLC

All material, images, and graphics from this site are the property of www.onlycubcadets.net. Any unauthorized use, reproductions, or duplications are prohibited unless solely expressed in writing.

Cub Cadet, Cub, Cadet, IH, MTD, Parts, Tractors, Tractor, International Harvester, Lawn, Garden, Lawn Mower, Kohler, garden tractor equipment, lawn garden tractors, antique garden tractors, garden tractor, PTO, parts, online, Original, 70, 71, 72, 73, 76, SO76, 80, 81, 86, 100, 102, 104, 105, 106, 107, 108,109, 122, 123, 124, 125, 126, 127, 128, 129, 147, 149, 169, 182, 282, 382, 482, 580, 582, 582 Special, 680, 682, 782, 782D, 784, 800, 805, 882, 982, 984, 986, 1000, 1015, 1100, 1105, 1110, 1200, 1250, 1282, 1450, 1512, 1604, 1605, 1606, 1610, 1615, 1620, 1650, 1710, 1711, 1712, 1806, 1810, 1811, 1812, 1912, 1914.