Hi guys
Been shopping for motorslots of choices and lots of new tech to wrap your head around.
So has anyone work out the pro's and cons of Direct injection 2 stroke engines? I am intrested in what the differences are between the Opti (Merc) - Etec (Rude)- TLDI (Tohatsu) - HPDI (Yammie) and what are the pros & Cons.
Please lets not make this another 4S Vs 2S debate, i just would like to know more about the different DI 2 strokes.
BigE
Hi, I have 2 Etec motors, 1 x150hp on seafarer victory, i find them to be a great motor good on fuel great power right through the rev range and instant power when you want it, the other motor is only 2 months old and it is a 130hp on a 5.5 centre console, only done about 20 hours on this motor but first impression are that i think it is a bit sweeter motor than the 150? once again i am realy happy with both motors have had a couple of teething problems with the 150 ie faulty injector but was fixed no problem and hasnt missed a beat since, Interestingly i just took a cruise craft 685 explorer for a test a couple of weeks ago fitted with twin yamaha 115 four strokes which was a beutiful set up but realy noticed the power difference mid range! Would be interested if anyone has a 685 explorer with twin 130 etec and what they think, But will start another post about that. Regards Hilta
thanks hilta1
Intrested to hear more about the 130. The Etec look sweet on paper V4 no belt or chains good starting and charging set up & pretty good weight wise.
I have a 2007 E-tec 250... Had a a couple off injectors replaced at 19hrs which is the only trouble I have had with the motor.. I have 390hrs on it now it's still a brillant motor to operate... Quiet and low to no fumes.. Yesterday I ran from Southport Broadwater to Jack Evans marina behind Point Danger (23miles) in 40 minutes for 24lts.. I was pushing it pretty hard with the prop coming out off the water many times....
Pending on where you live, you are best to buy a motor that has a good dealer reputation in your local area..
Also try and get on a few boats that have the motors your looking at so you get a feel off what you want.. What I find perfect for my needs may not suit yours...
Thanks Jabba.
good to hear they sorted the injector problem. was it a part problem or a fuel problem. I believe all new motors need much greater fuel care & filtering than most opterators are aware of. (including 4 s)
BigE
It was a part, aparantly in 07 there were a batch off injector that had voice coils out off spec.... In 2008 they brought out and new injector which is more reliable, BUT there software programing was not very good so there were a few injector stuffing up then also... Now though the only issue I am hearing is E10 related, and the shit that it's doing to the fuel lines... Degrading the inside and leaving the mess inside the injector... This is happening to every brand, and I know on one brand off motor (NOT E-TEC) when this happens the entire fuel rail has to be replaced......
I can vouch that the E-tec injector is a roubust injector and will tollerate water to some degree as I found out first hand.... I forgot to put my fuel lid back on and the filler is located in the splash well... I was support boats for an outrigger team and it involves a lot off stop starting dropping off crew and picking up crew... Each time I dropped off the plane to drop off crew, I was getting sea water in to my splash the splash well into my filler... My motor started to stall a bit during the day, and I was concerned that there was a problem with my motor..
It was not untill the finish I realiszed I had not screwed on the lid and I had been getting water in the tank and that what was causing the stalling.... What I did as soon as I get home was drain the water out off the tank and added 1 bottles off Stabil fuel treatment.. I put the boat back in the water and ran the boat to Jumping Pin and back at 4500rpm (45mph) to burn up as much fuel as I can and push out and remaining water left in the tank... I then refilled the tank and added and aother bottle off Stabil... That happened in September 2010 and 150hrs ago....
Its water left to sit inside the injector that kills an injector...
Thanks Jabba.
Did a bit of a search on TLDI & Opti's and it appears they use the same injection system just on diff engines. Etec seems to be an entirely different system and the HDPI system is still a mystry to me ATM.
BigE
big e those reds look familiar, mate i,ve had three etec's a 90hp i did a 1000 hrs on and did no injectors and had no probs then i got a 115hp i did 6 injectors in 900hrs then i had a 150 hp i did 1300hrs and did 2 injectors since this i'm giving two 150 yamy fours and a 150 honda four a go because it was starting become clear that evirude isn't capable of fixing the injector situation and it was becoming a life and death issue crossing bars when one decided to pack it in right in the middle of one.
I dont have any figures but i owned a 115 Optimax on my platey and compared to my 200 hpdi yami i reckon it chewed way more oil. Could be wrong but the opti seemed thursty for oil.
Either way with the yami you can use any good quality tc-w3 oil, and the yamilube is cheaper than the quicksilver opti oil.
Here's is an E-tec that spent 2.5hrs underwater, then set a new speed record
http://blip.tv/cumbrialivetv/evinrud...niston-1510966
So Jabba ya give that a go ???? the under water bit
Garry
Retired Honda Master Tech
No bloody way Gary..
Samson
yep them reds would be familar. pulled any lately?
Almost all new motors use some form of fuel injection, 2 or 4 stroke, in 2 strokes they also have an oil system, as distinct from a sump with an oil pump built in (I know that is very basic, but lets start there), they both require oil to keep them running, now some have HP fuel injection, that being high pressure, and the entire fuel "rail" is under high pressure, and requires a high pressure pump of some sort (extremely common) this pressure in needed to inject (squirt) fuel into the cylinder that is under compression, so that is the HPDI system, others use a lower pressure fuel system, but require a high pressure injector to over come compression, either system works equally as well, both are in use today, whether one is better than the other is anyones guess, my "guess" is no, they are both fine.
oops, I forgot the DI part, that is direct injection, meaning it injects fuel directly into the combustion chamber, as distinct from a standard old carby 2 stroke where the fuel/oil mix was inducted into the crankcase, and transferred to the head by ports, or a 4 stroke that used a manifold system with perhaps a single injector, this is often refered to as EFI or fuel injection, as it was called too.
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