How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask PK. Your Own Question
PK. , Small Engine Technician
Category: Small Engine
Satisfied Customers: 1052
Experience:  Retired Owner of a full service shop and national parts sales website.
Type Your Small Engine Question Here...
PK. is online now
A new question is answered every 9 seconds

Lawnmaster Countax c300h hydrostatic ride on mowwer

Resolved Question:

I am having problems with the hydrostatic transmition, its getting worse each time i use it , it takes a while to warm up and get moving.
It has no oil leaks,the belt is OK,everything is clean& moving OK,
As i do not have a workshop manual & there is on obvious place to check fluid levels ,the next step i will take is to pull it apart.
Can you give me any advice??
Cheers Ian.
Submitted: 7 years ago.
Category: Small Engine
Expert:  PK. replied 7 years ago.
Hi, I'll see if I can't help you on this one. First off, is there a tag on the back of the hydro with a name, model and serial number? If not, what's the model number and brand of the mower?
Customer: replied 7 years ago.


on the tag it has ....TUFF TORQ K46E CNTX-LT S/N: 003761


Make Countax Lawnmaster C300H Hydrostatic.

Expert:  PK. replied 7 years ago.

These transmissions aren't intended to be serviced, but there are some things you can do despite Tuff Torq's best attempts at preventing you from doing them.


The first thing to be sure of is that the drive belt isn't slipping. Be sure that the idler pulley/pulleys is giving good pressure on the belt and that the belt isn't glazed over.


After that I would check that the valves are operating properly. Get underneath the mower (not running) and have someone operate the controls. I couldn't figure out completely from the pictures of your mower how the controls work, but I assume there's a gear shifter and a engage/disengage shifter. Just look for a something that's not working as it should. Internally a valve may not be opening and closing properly, either from damage or carbon build-up, but you probably won't be able to tell that for sure. While you're under there, go ahead and clean the fan and as much of the transmission as you can get to. Heat is the real killer for hydrostats, keeping it clean is cheap insurance.


I don't believe they've made it easy to check the oil level in the transmission, so you'll have to be satisfied with making sure there are no leaks. There should also be a vent of some sort. It may be a rubber hose with a small screen or filter or it may be a small screen or filter stuck into the side or top of the transmission. Try and find this and see that it's clean.


Next step is to purge the system. This is fairly easy and I'll post the directions from Tuff Torq's site.


If all this checks out okay, then I think that you could use an oil change. I'm assuming yours is the one without the external oil reservoir? There's no plastic tank on the top of the transmission is there?


There's two ways to change the oil on this without opening the case, which I wouldn't do unless the oil change doesn't work. You can remove the transmission and turn it upside down and drain the oil out of the fill hole, or you can leave it in place and siphon it out. I prefer to siphon the oil out using an oil change siphon. I'm not familiar with how your mower is made, but on most mowers, there will be some sort of access hole under the seat, sometimes under the battery. Some you have to access the fill hole from under the mower. I don't work on Tuff Torq very often, but I think the fill plug is on the right side. Refill with 1.9 liters of 10W30 motor oil. You'll need to purge the system after changing the oil. For purging directions, see:


This has about a 50/50 chance of fixing things. Other things that could be a problem are a stopped up internal filter, worn pistons on the pump, poor sealing in the pump, and excess carbon build-up. Rebuilding these things is somewhat difficult and you must have a manual to check clearance specifications. The internal filter may need changing, this too is on the fairly difficult level and a manual is pretty much essential.


I hope this has been of some help, please don't hesitate to ask if there's any questions. Thanks, PK.

PK., Small Engine Technician
Category: Small Engine
Satisfied Customers: 1052
Experience: Retired Owner of a full service shop and national parts sales website.
PK. and other Small Engine Specialists are ready to help you

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
< Previous | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland

Meet The Experts:

  • Curtis B.

    Curtis B.


    Satisfied Customers:

    have worked on and around most engine models for 35 yrs./Polaris ATV expert
< Last | Next >
  • Curtis B.'s Avatar

    Curtis B.


    Satisfied Customers:

    have worked on and around most engine models for 35 yrs./Polaris ATV expert
  • Rick's Avatar


    Factory Authorized Trainer

    Satisfied Customers:

    Outdoor Power Equipment technical trainer since 1990, covering eight states.
  • Jon K.'s Avatar

    Jon K.

    Small Engine Diagnostic Expert

    Satisfied Customers:

    Gold certified Stihl tech, Service Manager for a rental/repair shop.Certified in most small engines
  • James W's Avatar

    James W

    Small Engine Troubleshooting Expert

    Satisfied Customers:

    7 years as Mechanic & Parts Manager for Brother who has Owned Lawn & Garden Repair shop for 35 years
  • Vince O.'s Avatar

    Vince O.

    Small Engine Technician

    Satisfied Customers:

    Over 30 years experience repairing lawn and garden equipment. Chainsaws, mowers,blowers and trimmers
  • RUSS's Avatar



    Satisfied Customers:

  • Wayne's Avatar


    Engine Rebuilder

    Satisfied Customers:

    many years on egine rebuilding, lawn mower,roto tiller,Truck,and small engines