carbs on honda engines

U

UncleRichie

New member
I have a 1999 75 hp it has over two thousand hours on it and runs good .the only problem with the carbs was not draining them when I put it up for the winter. Each carb has a bowl drain if you turn of the gas and run the engine till it starts to run out of gas then shut it off ,take the lid of and drain each carb dry . After I did this I have had no problems at all with it. The carb rebuild kits are a joke three o rings per carb ( 75bucks) . I found that that you can reuse them with no problems. Working on them is very easy just take a pic of the side of the motor before you start ( the linkage is complex and the pic makes ever thing go togeather easy) . I have had them apart twice ( the second time was not my fault bad gas in Canada) .
If you take them apart mark the adjustment screw and count how many turns out from all the way in and set it back to the same ( just do one carb at a time ) from start to finnish should no take more then a couple of hours ( take your time ). The Honda carbs are some of the best carbs I have worked on very well done. I hope to get at least another 4000 hrs on mine as long as I take care of it.
Richard
 
I've been waiting to see if anybody drains the carbs on a Honda 40/90/etc., and finally here we are. Richard has it right.

I have a Honda 9.9, which refused to start when in Bellingham. After $250 at the local dealer, it still refused to start, until I pumped the acceleration pump. When I got home I pulled the carb apart and the cold start tube, a small orifice, was choked with white stuff. Cleaned it out and then it ran well.

So I learned to drain the carb after every trip, not after each use. It's simple, there's a little screw at the bottom of the carb. Loosen it, watch the gas run out and re-tighten it. If you neglect to re-tighten it, it'll let you know when you try to start the motor. No more trouble.

Avoids dealers and keeps those carbs in good shape. Listen to Richard.

The Honda 150 is fuel injected. Never drained the injectors unless I replaced the filter. Never gave me any problem, so that's a different animal.

Boris
 
We run the fuel out of the lines and then drain the carbs on our 2006 90 HP Honda. I have always run the fuel out--and the larger engines, also drain the carbs. With the Honda Generators, (although the carbs are easy to clean) it pays to drain them also.
 
Richard, one trick that one of my motorcycle buddies taught me was to mark the screw, then count turns as you run the screw all the way in. Then remove it. To reinstall, run it all the way in, then back out the appropriate number of turns. Purportedly, less chance for errors, and more accurate.
 
It took me two times having the carbs cleaned and rebuilt because I thought I was using the boat often enough. I thought that by having the extensive water separation/fuel system I would be safe, even when I can view and drain each filter.

My bad and with the help of todays gas, I lose. After a second $800+ bill to do a rebuild and full service on both Honda 2004 90s I have included a drain system to drain all 8 carbs.

I store 3ft of surgical tubing inside each engine cover to use for draining the carbs as others have described, I just do not run the gas out of the carbs. I keep a clean glass Mason Jar on the boat and drain the carb's gas into it. After I finish I have a good idea of the fuel condition and if all is well I return it to the main tank after each engine is done. Since I have started doing this I have not had any problems with the carbs. I should note that I am not as a frequent an operator as I should be, seeing I only have 467hr on the engines since Sept 2004.

So do drain the carbs whenever you will not be using the boat for a period of time (you alone can set that time). I now do this after every outing unless I am on a cruise.

Art
 
It took me two times having the carbs cleaned and rebuilt because I thought I was using the boat often enough. I thought that by having the extensive water separation/fuel system I would be safe, even when I can view and drain each filter.

My bad and with the help of todays gas, I lose. After a second $800+ bill to do a rebuild and full service on both Honda 2004 90s I have included a drain system to drain all 8 carbs.

I store 3ft of surgical tubing inside each engine cover to use for draining the carbs as others have described, I just do not run the gas out of the carbs. I keep a clean glass Mason Jar on the boat and drain the carb's gas into it. After I finish I have a good idea of the fuel condition and if all is well I return it to the main tank after each engine is done. Since I have started doing this I have not had any problems with the carbs. I should note that I am not as a frequent an operator as I should be, seeing I only have 467hr on the engines since Sept 2004.

So do drain the carbs whenever you will not be using the boat for a period of time (you alone can set that time). I now do this after every outing unless I am on a cruise.

I should also note that I always flush the engines with fresh water and SALT AWAY after every outing.

Art
 
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