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View Full Version : Redmax Trimmer BCZ2401S running bad


clif
04-12-2010, 06:39 PM
I have a fairly new redmax trimmer, the bcz2401s specifically. I don't know if anyone has ever had this problem, but the trimmer won't run full throttle anymore. It WILL run full throttle if held upside down! Crazy! I don't know for sure why this is. I cleaned the spark plug, and it gets good spark. I even yanked out that stupid little spark arrester screen in the exhaust port. Cleaned the foam air filter. I sprayed carb cleaner in the engine. I greased up the trimmer head gearbox, and put in fresh gas and two cycle oil. I also cleaned the fuel filter. After inspecting the cylinder head from looking in the spark plug hole, it looks black with crap caked on thick, and I suspect this could be the culprit. The carb cleaner spray is not even getting this out. My question is, what is the best way to polish up the cylinder head and internal engine parts without damaging them. I don't want to scratch this thing up and make it worse! Any help would be greatly appreciated!
Thanks, Clif

genesis215
04-12-2010, 09:47 PM
Don't worry. This is a pretty common problem with the Redmax strato-charged trimmers. There is a solution that many people have used that help's make their Redmaxes run great again.

Run 1 oz. of Seafoam per-gallon in your gas to get rid of the black carbon. It works great. Also try pouring it once or twice into the carb through the hole in the air filter area. Start it up. The engine will smoke like crazy, but it will burn the carbon out. This will also help clean out the exhaust port which is probably plugged, therefore causing your problem. Just yesterday we put some Seafoam in the engine oil of a car that had a sticking valve causing a clattering sound. After a one hour trip, the next time it was started, the valve had been freed up, and no more clattering! This stuff really works well. You can get it at O'Reilly's, Advance, Auto Zone, etc. Hope this helps.

NkyLawncare
04-12-2010, 09:53 PM
Just a quick question, do you run without the string guard or the guard adjusted up the shaft to allow a longer string to use trimming?

clif
04-12-2010, 10:09 PM
Don't worry. This is a pretty common problem with the Redmax strato-charged trimmers. There is a solution that many people have used that help's make their Redmaxes run great again.

Run 1 oz. of Seafoam per-gallon in your gas to get rid of the black carbon. It works great. Also try pouring it once or twice into the carb through the hole in the air filter area. Start it up. The engine will smoke like crazy, but it will burn the carbon out. This will also help clean out the exhaust port which is probably plugged, therefore causing your problem. Just yesterday we put some Seafoam in the engine oil of a car that had a sticking valve causing a clattering sound. After a one hour trip, the next time it was started, the valve had been freed up, and no more clattering! This stuff really works well. You can get it at O'Reilly's, Advance, Auto Zone, etc. Hope this helps.

Thanks, that sounds much easier than what I had in mind. I hope it does the trick, will let you know after I get some seafoam if it worked!

clif
04-12-2010, 10:12 PM
Just a quick question, do you run without the string guard or the guard adjusted up the shaft to allow a longer string to use trimming?

I use the string guard as it came, never thought it was a good idea to modify it.

NkyLawncare
04-12-2010, 10:55 PM
That's what you want to do. I was asking because I was told just tonight by a dealer that Redmax has had problems with users adjusting the guard up to be able to use more string to trim and that that mix ratio was actually wrong in this situation due to rpm, etc.

genesis215
04-12-2010, 10:59 PM
It might take a couple weeks or more to clean everything out if you just run it only in your gas mix, just to let you know. That's why putting it straight in the carb will help clean it out really fast. It will also clean out your carb jets, and keep you from having carb problems as frequently. There's a guy on here that has 6-year old Redmax equipment that still have the original carbs because he's been using Seafoam.

I run it in all of my handheld equipment, and it all purrs now.

Hope you get your trimmer running again!

GlynnC
04-12-2010, 11:24 PM
[QUOTE=genesis215;3518520]Don't worry. This is a pretty common problem with the Redmax strato-charged trimmers. There is a solution that many people have used that help's make their Redmaxes run great again.

Run 1 oz. of Seafoam per-gallon in your gas to get rid of the black carbon. It works great. Also try pouring it once or twice into the carb through the hole in the air filter area. Start it up. The engine will smoke like crazy, but it will burn the carbon out. This will also help clean out the exhaust port which is probably plugged, therefore causing your problem. QUOTE]

Seafoam is a great product--I add it to all my gas/oil mix. Used on regular basis, very little internal carbon is formed!!!!

Hey Genesis, I see you live in Russellville Ark.--lived there for a few years back in the late 70's--a great place to live.

genesis215
04-12-2010, 11:31 PM
Yes, it is beautiful here with the Boston mountains and Lake Dardanelle.

clif
04-13-2010, 08:26 AM
That's what you want to do. I was asking because I was told just tonight by a dealer that Redmax has had problems with users adjusting the guard up to be able to use more string to trim and that that mix ratio was actually wrong in this situation due to rpm, etc.

Thanks for the tip. I see a lot of lawn guys running around with echo trimmers doing this and I could only guess either their guards broke, or they wanted a whole bunch of string at once, seems like a string waster to me. My mower can usually trim close enough without the need for any extra string like that. If not, we bring out the trimmer again, hate to leave a job looking ugly ;-)

clif
04-13-2010, 08:37 AM
It might take a couple weeks or more to clean everything out if you just run it only in your gas mix, just to let you know. That's why putting it straight in the carb will help clean it out really fast. It will also clean out your carb jets, and keep you from having carb problems as frequently. There's a guy on here that has 6-year old Redmax equipment that still have the original carbs because he's been using Seafoam.

I run it in all of my handheld equipment, and it all purrs now.

Hope you get your trimmer running again!

Thanks for all the help, I will put some in straight like you suggested, I need this trimmer running good soon. I will also keep some around to add to my fuel to keep things clean. I would guess I could add it to my mower's fuel tank also, not that it's having any troubles though. Worst problems I'm having are these "one-time" job pita's that claim their mower broke and they need someone to cut their yard just once since they are having visitors over or whatever. Boy did I underbid one yesterday. It looked like the grass hadn't been cut since last September, and the driveway and sidewalks were never edged since Jimmy Carter was in office. Not to mention all the crap in the yard that was "supposed" to be picked up prior to my arrival. Wow, I hit two bricks, one iron peg, a shoe, a tennis ball, a full size beach towel, and I think a gold brick egg maybe! None of which were visible, hidden beneath tall clover patches. My poor mini z has been through a lot, but she's still going strong! lol

clif
04-13-2010, 10:10 AM
It might take a couple weeks or more to clean everything out if you just run it only in your gas mix, just to let you know. That's why putting it straight in the carb will help clean it out really fast. It will also clean out your carb jets, and keep you from having carb problems as frequently. There's a guy on here that has 6-year old Redmax equipment that still have the original carbs because he's been using Seafoam.

I run it in all of my handheld equipment, and it all purrs now.

Hope you get your trimmer running again!

WOW! This stuff really works. I put some in the intake ports, and it smoked blued for a while, but ran wide open, so I repeated this two more times to be sure, and each time, wide open just like new. Put a little in the fuel tank, and some in the other equipments' fuel tanks to get them cleaned up too. I'm always skeptical of miracle easy cures, but this one was just that. Worth the $10 at Autozone for sure... Thanks a million, you saved me hours of headache to come!

genesis215
04-13-2010, 11:27 AM
That's great! Very happy for ya. The only thing I would be cautious about is putting it in the tank without measurement. The can says 1 oz. per gallon, so I would put in the appropriate amount into your gas mix can rather than the gas tank so you don't lean out the 2-stroke oil in your mix too much. Just something to consider.

Anyway, very glad to be able to help!

Alan0354
04-14-2010, 03:36 AM
Use the Deep Creep, which is the spray version of SeaFoam. It meant to clean carbon. Follow the instruction spraying until it stalled, sit a few minutes and fire it up and let it smoke for a while. I do this on all my stuff once a year.

Do you have an idea how many hours you have on the trimmer to build up all the carbon?

lawns Etc
04-14-2010, 04:56 PM
This fixed my 4 yr old 2400 trimmer that I thought was dead now its back like new thanks for the tip. I poured it into the carb while running and it stalled. Then started and was all smoke for a few minutes good advise!!