need help honda 90

[Larry H]

Joe,

I think that is happening here in WA. I have had problems after two fillups in June and July( at fuel docks). The last three fuel dock fillups have been good, though.

I read that MTBE gas and E 10 don't mix well and can cause running problems. The article also said that the new E 10 gas doesn't store well (not over 30 days). They recommended leaving tanks low to empty in storage and using a fuel stabilizer.

[Sea Wolf]

Larry-

There's a discussion of this on The Hull Truth site, along with a reference to a very good article in a professional boat builder's magazine.

Joe.

[Larry H]

Joe,

Yes, that's where I read the info, in the Aug/Sep 06 issue of "Professional Boatbuilder" magazine.

[starcrafttom]

stopped by the boat tonight and used a spark plug checker on all cylinder and they checked out just fine. the prop spins in neutral just fine, i removed some line a few months ago when I lubed the prop. I did not check the travel on the throttles but will after work tomorrow.

The one thing I did notice was the fuel line coming off the fuel filter and going to the "y" between pumps was soft and collapsed. It did not seem to matter at idle but might suck down at wot. I will check it tomorrow with the boat moving and may even just cut a new piece and install. depends on how the fishing is.. Thanks for all the advice and I will keep you posted.

[Almas Only]

Susan E:

I suggest you pull the entire fuel line, and after draining it out, place it on a workbench, and use a sharp razor blade or tool to slice it down the middle, from one end to the other, rather than just cutting across the soft spot. It would be nice to have a look at the inside of the tube, along its entire length, so you could see if you're just dealing with a weakening, or if you also had parts of the fuel line lining breaking off, and heading upstream to your motor. If that's the case, you'll want to replace any separate filters, such as a Racor, as well as the Honda filter which is on the starboard side of the motor, just below the carbs.

Let us know, but it looks like you're on the right track.

[starcrafttom]

almar the weak spot in the fuel inis after both fuel filters and is only 2 inches long, besides its sockeye season. I will report after running the boat to day. I also noticed that Iam a quart low on oil? I replaced the ail fitler and filled the oil just a few months ago. As many of you know I use the boat almost every weekend. How much oil does your honda use???

[Byrdman]

Tom... you are huning fish and RPM issues....I'm hunting houses in Clarksville TN. Hope you catch some fish...and I feel what ever the issue is ...it will be a simple thing. I'd change the plugs, that is simple to do, having a tourque wrench. How long since you changed the fuel filters???... and...are they not suppose to catch trash?? Who knows if trash has not come in the system since the last filter changes..? Don't think your boat sits enough for anything to gum up. ...but... you may have had down time. The fuel line gig is interesting..and needs to be fixed. Back to the plugs....and the folks on here way smarter than me... but...can't something be wrong with a plug and not really be visible to the naked eye....kinda down inside the plug??? Maybe??

Good luck on the fish man... and enjoy the water a bit for me. Too much time without being on a wet hull for sure here.

Byrdman

[Captains Cat]

[ccflyer]

Here's my two cents.

This is my first season and I've had the same problem - I can't get my Honda 90 past 5000 rpm. I know fuel additives like ethynol are not the problem since I am using 100LL Avgas - I sell it at our airport.

So today I took my aircraft mechanic to the slip and he found the cable needed adjustment at full throttle. That is, with the control at full forward there was still play in the cable.
He made the adjustment and off we go. And for the first time since I've owned the boat, (in 1-2 ft seas) I'm at 5600 rpm getting 28 mph on the gps read out.

Now a quandry - on the run back, following waves, again I can't get over 5000 rpm - but I'm getting 24 mph.

The mechanic says he thinks it's the chop but I say the chop would impact the speed but not the rpm's.

So tomorrow morning, when it's usually pretty flat in the bay, I'm going to see if I can get up to that 5600 again.

BTW: Ethynol is a hot topic among boaters here on Cape Cod. I heard Yamaha put out some sort of emergency bulletin. One local E-tec dealer has been sending me folks for 100LL at a $1 premium over marina prices - but the engines seem to love it.

Phil

[gljjr]

Tom,

From what you have stated I would simply replace the fuel line. It should be a pretty simple thing to do. Of course with the boat in the water it is not so simple working on the back of the motor!

Got an extra seat for Sockeye?

[Almas Only]

Susan E:

My 2003 Honda 90 doesn't burn any significant oil. However, it's fairly easy to get dip stick readings which indicate otherwise. Most oil filters allow oil to drain back down into the crankcase, some quicker than others. So, if you fill and check with the engine cold, you can end up getting a reading indicating full. Then, if you check shortly after the motor has been running, and the filter is full of oil, you'll think you're using oil, when, in fact, you're just moving it from the crankcase, to the filter.

Wonder whether you're really using oil, and if so, how much are you talking about, and at what rate?

As to the soft spots in the fuel hose, if they are run between the motor's built in filter and the fuel pump/carbs, I suggest you don't mess with them, and just replace asap. The more you squeeze them, the more you risk clogging your carbs with particles which you knock loose from the inside wall of the hose. If that happens, you've got a mess on your hands.

david

[Mark Toland]

Don't under estamate the effects of a dirty bottom. This time of year your bottom can become fury very quickly. If your boat is moored check its bottom befor spending your mony on motor repairs.

[starcrafttom]

really quick. oil was a quart low, cable is the likly cause of my problems , got one trout around 15 inchs. more later.