Honda BF 90

Wallkerbay · Posted: Sun Jun 07, 2009 6:46 pm Post subject: Honda BF 90

Does anyone know how long a Honda 90 should go between carb rebuild?I had the carbs rebuilt at 90 hours.Now it is doing the same thing again.I mean running rough at 2000-3000 rpm. I love the boat . It rides better than my Bayliner did.The C-Dory 22 is just right for my wife and I. Now I have a 108 hours and I think the carb need to be rebuilt. I did what I was told to do.Disconnect the fuel line at the motor and run it out of gas. I did that.Any help would be greatly appreciated.Thanks Neal Disgust

starcrafttom · Posted: Sun Jun 07, 2009 7:19 pm Post subject:

There is a article in this months ( forgot which mag) about how bad E10 is for out boards. the biggest problem being the clogging of carb jets. They covered the cause of the problems and the best way to avoid it and not have to rebuild your carbs. The best thing you can do is not use E10 to start with. Mean while the government is trying to get E15 in the gas supply. Call your reps and have them vote no on this stupidity.

P.S. it was in Soundings

blackfish · Posted: Sun Jun 07, 2009 9:56 pm Post subject:

hi Neal

I have a bf90 as well 2003
from what I've read you don't pull the fuel line and run dry but drain the bowls
and of coarse never trailer your motor after draining the fuel from the carbs

and yes if it is running rough sounds like its time for a carb clean
next time try using sea foam or fuel stablizer with every fill up

how long are you going between runs? 108 hrs on a 2006 is that over three years?
if so thats not much , the fuel is gumming up the jets and passage ways

did you do the last rebuild yourself?

starcrafttom · Posted: Sun Jun 07, 2009 11:56 pm Post subject:

why would you not trailer the boat after draining the bowel's ??/?? I have always pulled the gas line and ran it dry, as directed by my dealer and mechanic. I have almost a 1000 hours on my 90 now.

Yellowstone · Posted: Mon Jun 08, 2009 12:02 am Post subject:

My experience with the Honda 90 was this. Used almost daily, virtually no problems. Allowed to sit for six months, bad news. This prompted me to go to the EFI, which seems to avoid the carb problem. John

blackfish · Posted: Mon Jun 08, 2009 12:14 am Post subject:

trailing after draining the bowls allows the floats to bang around dry very bad for them
I'm not sure why you would drain the bowls rather then running them dry
just what Ive read on the subject

so you run your motor dry every time you use your cd ?

starcrafttom · Posted: Mon Jun 08, 2009 12:29 am Post subject:

every time I use the boat I come home and run the carbs dry while rinsing the motor on the ears muffs. This way if I dont use the boat for a while I dont have to worry about the carbs gumming up. I dont drain the floats by hand but I think that running the carbs dry does??? Never heard of any trouble from this. If you are right about the floats bouncing causing damage ( not saying you are) then would hooking up and pumping the bulb to fill the carbs be a good idea before hitting the road.??

thataway · Posted: Mon Jun 08, 2009 1:15 am Post subject:

Hmmm, I have been draining or running out the fuel in outboards for the last 60 years--and never heard of the float being a problem. (Many of these boats were trailered considerable distances)--Is this a problem just with the Honda 90's? I have done this with Honda 15's 8's and 2's with no problems. (Currently we have gone over 1700 miles with the Suzuki 2.5 with no gas in the carb--and went over 5,000 miles on the trailer in the last few years.)

I would certainly be putting in the best addatives, as well as using fresh gas, and draining the carbs. --but am always looking for new information--as in the floats being damaged....

Almas Only · Posted: Mon Jun 08, 2009 6:57 am Post subject:

Neal:

Send me a PM with your phone number, and I'll give you a call and see if we can't come up with an easy fix that doesn't involve rebuilding carbs.

david

ccflyer · Posted: Mon Jun 08, 2009 9:10 am Post subject:

First, I'd try a can of Sea Foam (1 oz per gallon) before I took off the engine cover. Thumbs Up

Wallkerbay · Posted: Mon Jun 08, 2009 5:11 pm Post subject: Response to BF 90

I keep my boat at a marinia,in dry stroage.I have put a fuel stabilizer in both tanks when I last filled up. I get gas at my marina.They sell only sell mid grade. A lot of others get gas there as well. I am taking it back to my dealer.I have not seen any water in the fuel /water separator.

Jeff_e_d · Posted: Mon Jun 08, 2009 7:06 pm Post subject:

I always run my carbs dry when putting the boat away. Seems to have saved me some troubles as I have put my boat away for as much as 4-5 mo's and not had carburator problems.

Sea Angel · Posted: Mon Jun 08, 2009 7:34 pm Post subject:

Neal;
I took my CD out today and had a similiar problem. The 90s would stall
when I advanced from abt 1200 -2000 to cruise pwr at abt 3800. They
would hesitate and stall unless I was fast enough to hit the choke
momentarily. The idle was also low at 800 verses 900-1000.

I talked with my mech and he noted a lot of this lately and it seems that
the gas being delivered may be climatized. I had my 90s tuned the end of
February. He is going to check the vacuum and idle/jet settings before we
discuss a rebuild.

I do change both filters to each engine every 75-100 hrs. I also used
fuel stabilizers and conditioners with every fill.

Today I went by Vining Marina to find it and then on out to the CBBT and
the Third Island before returning to Lynnhaven, We managed to do a
rescue with a man stranded on a 38ft demasted sloop at anchor. It was a
simple pickup and run to the marina. He didn't have a radio, or phone.

That was my Monday and alll I went out to do was swing my compass,
which was successful, 7 hours later I returned to my dock.

Wefings · Posted: Tue Jun 09, 2009 9:45 am Post subject:

We have had the dreaded Honda carb problems here in the South for a long time . Long enough for us to stop selling the carbed motors years ago as I feel its bad customer service. From monitoring this forum , I think the problem is creeping northward . An older Honda 50 or 90 will not run right in as little as 3 weeks non use down here .
I use PRIG fuel treatment pretty successfully . But the real answer to properly storing a Honda with carbs is to drain the float bowls.
Marc

starcrafttom · Posted: Tue Jun 09, 2009 1:10 pm Post subject:

Marc, Can you tell me if running the engine dry drains the carb bowels or is that something else I should do??.