Hi, I have a 2004 hydro 80, had it for 18 months and has been great. Start of last month it cut out on a job after about 20 mins work. After a few minutes it ran fine again for a while ten started running rough, surging etc both when cutting and just travelling, (though more when cutting) sometimes i’ll get 30mins from it other times just 10.
Did a service, oil, air filter, oil filter, fuel filter, and spark plugs. Checked that the fuel pump was pushing fuel through and removed carb to check for anything obvious. Still not sorted.
Sent to local service shop, they sprayed carb cleaner, vacuumed fuel tank and changed fuel filter tested and dropped it back 2 weeks later. Cut my lawn with it and 10mins in same issue!
Any ideas or thoughts? Are there any sensors or faults which occur based on engine temp? Only wonder as fuel flow looks to have been explored unless perhaps temperamental fuel pump.
I’m not a huge outfit and ride on is mainly for larger sites to save me time so don’t want to be without it again for weeks on end or to end up with huge bills as £50 already spent. Should I just bolt on a new carb?
Thanks,
Justin
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Replies
Hi Justn,
We have found that the simplest things are more than often or not the cause and the best place to start . Before you go putting a new carb on might be worth checking the fuel tank cap vent is not blocked preventing fuel flow and vacuuming . There are no sensors relating to engine temp . I will ask our service guys to reply to you tomorrow with some thoughts about problems relating to failure after use and when warm. Richard RTM
Which engine is it? From memory there are 3 options on the H80
Thanks Richard, it’s the Kawasaki.
This sounds like a fuel flow issue. Quite common to get grass or similar blocking tanks on these machines and poor fuel flow leads to fuel starvation after a time. Check tank vent as suggested earlier or run with cap loose on top to see if problem goes away, i.e. don’t turn it on threads just place it into tank. Take pipe off before pump and you should get solid flow into a jar or similar even if run for a minute or so. Allow time for flow to weaken if there is a partial blockage. Also look at fuel pipes. If old are they sucking in/closing as engine gets warmer.
Thanks, just had it out this morning, ran great for 40 mins then the issue came back again. I checked the vent in the fuel cap and that is nice and clear, loosened it too but no difference.
Will remove pipe before pump and check that this evening and probably replace the fuel pipes just to rule it out.
thanks for your suggestions, Justin
Sound advice from Derek and much the same as our service guys have said to me this morning , They ahve advised that the fuel tap itself can also cause problems and we have had to change these in the past as well as fuel lines to overcome fuel problems.