sx 190 with V Max HPDI vs Carb 150

[ks cranker]

Hey Guys - Need some help. I'm looking at an sx 190 - should I spend more to get the HPDI or same some cash in the beginning with the Carb 150?? Why?

Thanks!!

[PSM207]

There is a significant difference in fuel economy between the HPDI and carbed engine. With the price of fuel, I personally would not consider a carbed engine. If 150 HP is your choice, have you considered the Yamaha F150 four stroke?

[Bug Bunny]

I'd go with the four stroke without question. Second choice would easily be the injected. Like others said with gas prices the carb would definitely be out.

[stevieraybla]

Can someone please let me know how much difference there is in gas milage between the carb and the HPDI. Where I fish at I doubt if I go more than 10 to 12 miles during a tournament so how much could that save me in a tournament day maybe $2. I would rather save the $2500 at the purchase time.

[njpaul]

Even at $5.00 a gallon, $2,500. is 500gal of gas. If you're gonna run a lot then get the HPDI or the 4 stroke. If you're talking about a hour or two a week, go with the carb, because you'll only be saving a gallon or two a week with either of the other two(I can't believe I'm saying this). You will burn close to the same amount of gas at WOT regardless of what you get.

[PSM207]

Compared to either the HPDI or 4 stroke 150, the 150 carbed engine will get approximately 30% less fuel economy across the rpm range. With that being said, you will be wasting approximately 1/3 of every full tank. At $3.00 a gallon, this computes to something close to $4.00. Now take into consideration the cost of oil, then the actual cost per gallon increases another 25 to 35 cents per gallon.




Modified by PSM207 at 8:25 PM 1/23/2008

[PSM207]

I have to agree that the approximate $2500.00 cost difference of the 150 carb is significant. However, if you keep the boat for several years and use it often, then payback isn't far off. The HPDI and 4 stroke engines typically start easier, and idle much better at low rpm.

I'm am very pleased with my F150 four stroke decision. I do wish that an F175 was available. Oh well, so much for wishful thinking!

[Neilslure]

When I was shopping for a new boat I looked at the Yamaha performance bulletins. Looked at my Stratos which has a carburated 150 and compared it to a ZX225 with a 225 HPDI. I was very surprised that they both got about the same MPG. Sure that HPDI will pay for itself over time, might also help resale value, especially with gas prices always on the rise.

[Big Al]

Bryan,
The fuel difference is really not the important issue here. I will tell you to buy the HPDI instead of the carb engine, but I will also tell you to buy a 4 stroke instead of the HPDI. There are EPA regulations already in place for 2011 which is only 3 years away. A carb engine does not meet those regs and therefore there will be no carb engines in 2011. All engines are "grandfather'ed in", but if you decide you want to sell the boat in five years, the value of it with a carb engine will be significantly less, and many people will not want it. Both the HPDI and the 4 stroke meet 2011 EPA regulations. I say a four stroke for a few reasons, and I have one on my SX190. It starts easier, is quieter, weighs the same as a HPDI, doesn't mix oil with gas, so it nevers spits, runs cleaner and most important, it does not inject fuel at the high pressure like a HPDI. With a HPDI, any contaminants could cause problems in the injectors on an HPDI more often than a 4 stroke and even blow a head. Also, spark plugs last much longer because there is no oil to contend with in the cylinders, and some people never fog a 4 stroke when they put it away for the winter (I recommend fogging). BTW, my SX190 will do 60 MPH with 2 guys and gear.

[ks cranker]

Good stuff guys - I really appreciate all you input... Now I need to go find some more $$$!

[lwlittle]

What is the 1st year that Skeeter started putting 4 strokes on in the factory?

[PSM207]

I have the first SL series with the F150, which I purchased in '04.

[Obiggen]

I like the HPDI , @ todays cost of fuel it wont take long to make up the diffrence, in the price , as far as fuel saved , more though if you plan on keeping the boat for a long time.

[ChrisH]

i like to run fast a lot. at WOT the fuel difference is minimal. there are many more complicated parts on the HPDI engine to break than the carb version. the high pressure fuel pumps are $$$$ to fix also. that being said if the price was the same i would probably buy the HPDI but to me it wasnt worth it. you cant kill the carbed motors if you tried. ive heard of many more failures of the HPDIs than the carb motors. i would still buy one over any other manufacturer though

[JohnM]

Bryan, I've had a 150 ProV and now own a 175 HPDI. I agree the carb motor is near bullet proof. A friend bought that old boat and motor, it's a 97 with near 700 hours on it. I am not sure if he has even replaced the fuel pump diaphram's yet? It's had fresh plugs and a water pump impellor every two years. The 175 HPDI is simply AMAZING in the mid range and out of the hole!!! I love the fact that no matter what time of year it is, no matter how hot it is, or how cold it is I can hop in the seat, turn the key and she purs like a kitten. No pumping the bulb choking the engine etc... I wonder if I have a bulb anymore ?

My rig is for sale right now, EVERY call I have recieved they have mentioned the HPDI is a positive. I've had a few callers from the west coast, they canot run carb motors out there. Resale will be better on the HPDI. If mine is not sold in the next few weeks, I'll just keep fighting it in and out of the garage I am confident thte motor will run for YEARS.

The HPDI DOES require more maint than the carb motor. The lack of maint is one reason people complain of DFI's popping. The HPDI you are looking at should have a 10 micron filter that needs changing every 6 months or 50 hours. They cost about 15.00 and are easy to DIY. They also have a high pressure filter that needs changed at the first 50 hours of one year and every 100 hours after that. That little bugger is 80.00 part alone plus an hour labor. I do all the rest of my own routine maint.

This makes #6 Yamaha in my family, I am happy with em, which is better for you??? I guess that depends on how you fish, how long you plan on keeping the boat, etc...

My 2 cents worth.

[reelman]

IF you only fish about 3 days a month but have some cash...and a "go fast" attitude... go with the carb...get a Phase I kit installed...you will run with most 200s... takes 89 octane but you fish so little and saved up front plus maintenance is less... so it won't matter... you will be even for years.

[Marsh Skeeter]

Here is my 2 cents. I have an SX-190 with a 150 Carb. I made a run once last year. 75 miles round trip and burned 18 gallons of gas. The math says about 4.1 mpg. And I was running pretty hard, about 5000 rpms most of the time. Full throttle 5600 rpms sometime, for a few minutes here and there. I am running a Yamaha 25M prop, and all of that was with two people, junk, etc.

One other thing. My carb motor does not burn near the amount of oil as an HPDI.

Just something to consider.

[scottzim]

Difference between both motors MPG @WOT is minimal.
150 carb: 2.99mpg
150hpdi: 3.88mpg WOT

Check Yamaha performance .

http://www.yamaha-motor.com/ou....aspx

[PSM207]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by scottzim &raquo;</TD></TR><TR><TD CLASS="quote">Difference between both motors MPG @WOT is minimal.
150 carb: 2.99mpg
150hpdi: 3.888mpg </TD></TR></TABLE>

Those numbers equate to a 23 % difference. Less than insignificant in my opinion.

Go with an F150 and you will save on 2 stroke oil also!

[mark Z21]

to me its not about the fuel milage as much as how well the boat starts and runs 3 or 4 years from now, my hpdi starts in any weather and idles right off, any weather, my old carbed engine was a pain in the arse to get wormed up. and keep running untill hot

but definately the four stroke if you can get it