Changing a new Honda 8hp to a 9.9?

[PMW]

I have just purchased a Honda BF8 and noticed that it is the same motor as the BF9.9. Do any of you know what the difference is exactly and if it is possible to turn this into the 10 horse version? I am sure it isn't a Throttle stop, but is it some sort of mechanical governor that can be removed? Thanks.

 

[jimmbo]

Re: Changing a new Honda 8hp to a 9.9?

Take it back to the dealer and see how much it costs to trade up? At least you will still have warranty

 

[noelm]

Re: Changing a new Honda 8hp to a 9.9?

this comes up all the time, I am not familiar with that engne in particular, BUT it is usually more than just a "throttle stop" there is normally a lot a things, the two motors amy share a common displacement thats all.

 

[PMW]

Re: Changing a new Honda 8hp to a 9.9?

I cannot believe how 'tight-lipped' this trick is. Honda has done a good job of keeping the secret hidden from everyone except the people twisting wrenches on them. A very good Honda Mechanic showed me the difference and made the alteration to my engine. It made a huge difference on my 1956 Aqualine Semi-v. Just so the wave huggers don't get upset...I only boat in areas that allow any size motor. It wasn't a throttle stop like the old Honda 9.9/15's, but it is easier than you think. I couldn't find the answer ANYWHERE on the internet, so I am not going to be the guy who posted it. If anyone is interested, find a Honda dealer who has already made their life's fortune and they will probably show you. All of the others will try and keep it a secret so they can charge you $400 for the larger motor. Happy Boating!

 

[lifeisfun]

Re: Changing a new Honda 8hp to a 9.9?

yeah sure ....

 

[jimmbo]

Re: Changing a new Honda 8hp to a 9.9?

Well, PMW since you say you have the secret to more power why don't you post it? There is no law regarding increasing the amount of horsepower an engine makes, or any laws telling people how to do it. Put your money where your mouth is flappin

 

[CATransplant]

Re: Changing a new Honda 8hp to a 9.9?

I cannot believe how 'tight-lipped' this trick is. Honda has done a good job of keeping the secret hidden from everyone except the people twisting wrenches on them. A very good Honda Mechanic showed me the difference and made the alteration to my engine. It made a huge difference on my 1956 Aqualine Semi-v. Just so the wave huggers don't get upset...I only boat in areas that allow any size motor. It wasn't a throttle stop like the old Honda 9.9/15's, but it is easier than you think. I couldn't find the answer ANYWHERE on the internet, so I am not going to be the guy who posted it. If anyone is interested, find a Honda dealer who has already made their life's fortune and they will probably show you. All of the others will try and keep it a secret so they can charge you $400 for the larger motor. Happy Boating!

If you know how to do this, why keep it a secret? Will that do you any good? Either it's simple, in which case, you can say something about it, or it doesn't exist.

Why play games on a forum like this. Tell or don't tell. We don't care. But bragging doesn't get you points here.

 

[JB]

Re: Changing a new Honda 8hp to a 9.9?

What CATtransplant said.

"I know something you don't know" is a game for little girls.

 

[WillyBWright]

Re: Changing a new Honda 8hp to a 9.9?

Fact: It WILL void any warranty.
Fact: You're not going to own that motor forever.
Fact: All subsequent owners have a right to know exactly what they have and you have a moral duty to provide that information if it's different than what is represented on the hood. It could end up in the hands of a young novice boater. How would you feel if your child was injured by an unexpected overpower combination created by somebody else on the sly? It could be your own grandchild thru inheritance.
Fact: Knowledge of such modifications usually dies with the modifier or is quickly lost in the chain of ownership.
Fact: You can make it right by replacing the decals with appropriate decals. (Except for the warranty part)

Horsepower should NEVER be misrepresented!
NEVER modify to cheat limits!

Rant over.

 

[JUSTINTIME]

Re: Changing a new Honda 8hp to a 9.9?

i can see the EPA shutting down that shop ASAP and a heafty fine

this can be done on the 115 to 130
it is just the throttle body

 

[jimmbo]

Re: Changing a new Honda 8hp to a 9.9?

I forgot you guys have to deal with the EPA, even then you're still allowed to modify auto engines in cars and they're still legal.

 

[JUSTINTIME]

Re: Changing a new Honda 8hp to a 9.9?

I forgot you guys have to deal with the EPA, even then you're still allowed to modify auto engines in cars and they're still legal.

u will need a epa or a CARB sticker for that

 

[Silvertip]

Re: Changing a new Honda 8hp to a 9.9?

Jimmbo -- you are not allowed to modify your car either unless emissions certified parts are used. Check the title for your vehicle. In my state, there is a check box that says you certify you have not altered the emission control systems. Doing so could come back to bite you. Altering the emissions systems means anything that can affect emissions.

 

[PMW]

Re: Changing a new Honda 8hp to a 9.9?

So much for not upsetting the wave huggers... I wasn't trying to cheat any regulatory commisions; I just wanted a 9.9 for the 8hp price (to cheat Honda!). Sorry for upsetting everyone and thanks for kicking me in the shins on Easter.

 

[jimmbo]

Re: Changing a new Honda 8hp to a 9.9?

Silvertip...
I know about the certified parts thing, but you can make changes as long as certain rules are followed. None of that applies to me though, the province I live in is Canadas biggest producer of greenhouse gases and other emissions and has gone on record it will do next to nothing to reduce them. It might interfere with the mega profits of the oil companies. More than 1/4 the cars/trucks here have had the catalitic convertors removed.

PMW...
Just because two engines have the same displacement means a turn of a screw or jet change will be an instant hopup. Often it is things like carbs, valve timing or porting, compression ratios, exhaust tuning, induction differences etc.
About your shins, no prob my pleasure, my running shoes have steel toes


Sorry, I'm not meaning to hijack this thread

 

[Silvertip]

Re: Changing a new Honda 8hp to a 9.9?

No sweat Jimmbo -- Al Gore will have all of us cleaning up the air so you folks up top, East Asia, the Middle East and Eastern Europe won't have to worry about the problems they are creating.

 

[jimmbo]

Re: Changing a new Honda 8hp to a 9.9?

Actually the US is the one dragging its feet on global warming. Our former federal government signed what on to what is refered to as the Koyto Accord. It ia an agreement to lower CO2 emissions back to a level that occurred some years back, 1998 I think. Last week China agreed to join it. Your country, with the government it has, has ignored this treaty. I think your president Mr. Shrub has only recently admitted the is a problem called Global warming.
My provicial government, run by a bunch of right wing nuts has fought ANY Enviromental PROTECTION for the last 36 yrs. You can see the yellowbrown haze over any major city every morning. One suburb of Edmonton has the highest per capita asthma rates in North America. The fact it has many very large chemical and oil processing plants nearby have been waved off by the provincial government as insignifigant and irrelevent. Other parts of Canada, in the past have always be very concerned about pollution, other air quality items, acid rain, and the condition of the great lakes which are shared by our two nations

 

[Silvertip]

Re: Changing a new Honda 8hp to a 9.9?

But of all the nations that actually signed the treaty -- are any of them doing anything other than talking? Talk about thumbing their noses, China's water, air, sewage, health system, and food chain among others is at a frightful status. Russia and eastern Europe are not far behind. Ignoring a treaty that has no participation by others other than a signature is of no value to anyone. But of course we are expected to pick up the majority of the tab when something is done.

 

[jimmbo]

Re: Changing a new Honda 8hp to a 9.9?

Thr resistance the to treaty in Canada has all come the political right which presently is ruining, I mean running the federal government.
Nations that are presently some of the bigger pollutors are at a stage in development similar to what your country was 70 years ago. Back them your nation and ours were just spewing pollutants out. Our technologies have advanced but are costly. Too costly for developing nations which are trying to raise their standards of living. They might see it as 'well they polluted uncontroled years ago, why did we have to slow our development just because prior pollutors used up the pollution buffer the air/earth has?' No one nation or group really owns this planet. 24 men from your country during the period of 1968 thru 1972 got the rare chance to see the Earth from a unique view point. The men who flew to the moon and see with their own eyes just how small, delicate, fradgile and alone this planet is. Our only home. Because of that one would think your country, not just California, would have lead the way to preserve Earth. My guess, Republicans seized power and special interest groups got in the way.

 

[lifeisfun]

Re: Changing a new Honda 8hp to a 9.9?

Actually the US is the one dragging its feet on global warming. Our former federal government signed what on to what is refered to as the Koyto Accord. It ia an agreement to lower CO2 emissions back to a level that occurred some years back, 1998 I think. Last week China agreed to join it. Your country, with the government it has, has ignored this treaty. I think your president Mr. Shrub has only recently admitted the is a problem called Global warming.
My provicial government, run by a bunch of right wing nuts has fought ANY Enviromental PROTECTION for the last 36 yrs. You can see the yellowbrown haze over any major city every morning. One suburb of Edmonton has the highest per capita asthma rates in North America. The fact it has many very large chemical and oil processing plants nearby have been waved off by the provincial government as insignifigant and irrelevent. Other parts of Canada, in the past have always be very concerned about pollution, other air quality items, acid rain, and the condition of the great lakes which are shared by our two nations

I would suggest you to do more reading about this before coming to conclusions ...
http://www.friendsofscience.org would be good start ....