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Suzuki DT225 EFI

Old 01-15-2008, 08:58 PM
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Default Suzuki DT225 EFI

I don't know anything about them. I've owned 4 strokes for the past 9 years, I currently have a suzuki 4 stroke 175 hp and it's been great. I'm looking at another boat which has a suzuki dt 225 efi, Can anyone tell me if these are good motors?Can you tell me anything about them, good or bad. thanks for the help, Tony THIS IS A 2003 MODEL W/ 94 HOURS
Old 01-15-2008, 09:29 PM
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Default Re: Suzuki DT225 EFI

Love Suzuki and sell them. On that motor, watch out! That model and the 200/150 had terrible problems with the powerheads. Usually the number 5 cylinder would grab the piston first, followed by #6. The #5 ran about 25 degrees cooler than the others and collected the garbage that got past the filters and did not ignite the fuel charge as hot. Another thing. Bad fuel was a killer on those motors. Very unforgiving with the 225/200/150 V-6's. Blown powerheads were the norm if you ran bad fuel through them. The cylinders were all coated with Boron i think, and could not be honed out for another set of pistons if a rebuild was in order. I had a tech tell us 10 years ago that the block did not heat up as quick as the pistons did after first starting the engine. They said that because of this, the cylinder could not take the expansion of the piston as quickly, so, therfore you had to warm the engines up for a certain amount of time before blasting off. At least three failures of these powerheads I saw happened in the first 5 minutes of being started and run wide open. I personally blew one doing this. Too many negatives I think. On the other hand, I have some crabbers with DT225's at around 3000 hours on their third gearcase.
Old 01-16-2008, 06:51 AM
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Default Re: Suzuki DT225 EFI

I purchased a new 2003 DT225 in the mid summer of 2002 to replace the blown Sea Drive on my Sea Ox. At 15 hours I ate one of the pistons, Took it back to the shop and had the powerhead replaced under warranty. I now have almost 300 hours and the engine has been absolutely flawless. I have only done routine maintenance...spark plugs...water pumps...thermostats. the engine starts on the first or second crank every time and has been totally reliable since. I take it out about once a week from may till nov. It can push my 5000+ pound Sea Ox to a little over 40 mph at wot and I cruise at 4000 rpm/30 mph burning 11 gph. Over last season I had an average fuel burn of approx 4.5 gph..total fuel burned /total time run. I have been pretty happy with it and have had no real complaints
Old 01-16-2008, 07:14 AM
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Default RE: Suzuki DT225 EFI

i have twin 225 on a 27ec world cat i think they great
Old 01-16-2008, 07:31 AM
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Default Re: Suzuki DT225 EFI

I agree with ras315 on this one as I'm now rebuilding the powerhead on my Suzuki DT225. The middle piston on the port side is trashed and the cylinder is scarred, so I'm looking for a port side cylinder now. If anyone knows where I can get a used port side cylinder, drop me a note.
Old 01-16-2008, 08:42 AM
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Default RE: Suzuki DT225 EFI

I have a 2003 DT 225 bought new in Nov 02 on a 23' bay boat. It has over 1500 hrs and has been an outstanding engine. Had an intermittent overheat sensor problem that was tough to diagnose & fix. Started happening at about 100 hrs. Decarboned the engine for the first time last winter and have not had any further problems with the overheat sensor. Starts up easily and runs strong all day long.
Old 01-16-2008, 08:50 AM
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Default RE: Suzuki DT225 EFI

I never had a powerhead problem with 1000 hours on a pair of 1999 DT150's, but both of them got cracks in the gearcase housings that could not be sucessfully repaired and eventually wrecked the LUs. Check very carefully for cracks around the propeller hub area, and pass on the motor if it has them, no matter how small.
Old 01-16-2008, 09:49 AM
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Default RE: Suzuki DT225 EFI

I have that same nuisance overheat problem. I will be cruising along and the overheat sensor will go off. If I shut the engine off and immediately start it up all is good. I thought it was my new thermostats...my originals were like a 140 deg but after 3 years I thought I should replace them just in case but when I went to Suzuki...they no longer made 140 degree'ers . The new models were somewhere above 150. I figured that might put them close to the alarm limit on the older computers. That is really the only electrical glich I can think of.
Old 01-16-2008, 10:51 AM
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Default RE: Suzuki DT225 EFI

Try the decarbon method with Seafoam, it works. My mechanic could never find the cause of the overheat alarm problem. Checked t stats, poppit valve, fuel flow restrictions, etc. etc. Like you, I could shut the engine down and restart right away and no problem, happened almost every time out. Since using Seafoam last year, no overheat alarms, engine idles better, quicker throttle response and is quieter at idle.
Old 01-16-2008, 11:39 AM
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Default Re: Suzuki DT225 EFI

Did you spray the seafoam directly into the throttle body or mix it with the fuel. I usually run my fuel with some extra marvels mystery oil in it fairly regularly and I also throw some Lucas top end fuel injector cleaner/oil also. I am a firm believer that a "little extra" lubrication cant hurt a 2 stroke. My plugs don't seem to foul so It cant be hurting it that bad.
Old 01-16-2008, 12:14 PM
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Default Re: Suzuki DT225 EFI

I do the "pony tank" method, a seperate 1 gal. of gas w/ 16oz can of Sea Foam. Warm the engine up, disconnect the main fuel line, hook up the pony tank. Run for 15 min's @ 1200 or so RPM, turn off let sit for 15 min. restart and run for another 15 min. You should see a lot of smoke after the first restart, a little bit less after each cycle. Do this every 100 hrs or so and you will be good to go. Sea Foam also sells a product called Deep Creep, spray this into your throttle body as well to clean the air intake system. This stuff works, my engine runs like new and it's got over 1500 hrs.
Old 01-16-2008, 01:05 PM
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Default Re: Suzuki DT225 EFI

I had a 97 225 on 2 Dusky boats. The only issue was caused by a dealer who I purchased Oil from in bulk had water in his barrel. The motor dropped the cylinder and I had it rebuilt and my friend currently has it with over 1000 hours on it. Mine also had the intermittent over heat issue, but like others mentioned if you turned the motor on and off it would go away. The motor to this day will still crank on the first turn. That is why I had no concerns when I repowered my current boat with Suzuki 4 strokes.
Old 01-16-2008, 01:58 PM
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Default Re: Suzuki DT225 EFI

I have had 3 Suzuki dt225's. All 3 blew pistons.The 1995 model lasted about 1000 hrs,the used 1997 model lasted about 500 hrs,the new 2003 blew at 150 hrs ,rebuilt under warranty,then blew again at additional 500hrs,rebuilt again under warranty,then blew again rebuilt again ( had to pay for labor only this time) and then sold that and now have a 2007 df300 suzuki.Only problem so far with 305 hrs is broken forward drive gear in the lower unit,replaced under warranty( complete new unit).The boat i have is a1991 25 ft Parker CC ( semi vee)

FYI on the overheating problem:
i had that also on all 3 dt225's.I had it occur only in the warm waters in the summertime..the overheat alarm would not come on in the cooler winter water only in the warm summertime waters,usually about a minute or so after getting on plane. The fix is a factory fix from your dealer (free).It is a resistor plug in, that plugs into the temp sensor wires .This is located in the black plastic box at the left rear of the flywheel area.Simply unplug the matching purple/white wires and plug the resistor wires( male end/female end) inline into the existing purple/white wires.I had to do that to all my dt225's.After installing the resistor the problem goes away.The alarm may come on the first time you use the engine then it will not do this again.
Old 01-17-2008, 07:03 AM
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Default Re: Suzuki DT225 EFI

Old 01-17-2008, 07:18 AM
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Default Re: Suzuki DT225 EFI

Hi, I've got a 02 225 DT. Lower unit gear case housing cracked. I read that there is a salt build up that occurs that you can't flush out and this leads to hairline then bigger cracks. Mine cracked big time. It is in the shop and Suzuki doesn't have the part, back ordered.
The tilt system is also got a major gash in the piston, no idea how this happend. The side port for the flush out has rust bubbling under the paint.

I have about 300hrs on the motor. Any thoughts about how to go forward with this? Sell it? Rebuild it?

thanks to all on this site...
Old 01-17-2008, 09:18 AM
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Default Re: Suzuki DT225 EFI

Boca - I had my lower unit rebuilt with a new case. The case alone cost $1K, plus labor, so it was quite painful. Unless you can rebuild it yourself and save on the labor charges, you may be better off looking for a used lower unit. If I know now what I didn't then, then I would go with a used lower unit. But then again, you never know what you're getting with used either. Just my 2 cents........... Tough call.
Old 01-17-2008, 10:31 AM
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Default Re: Suzuki DT225 EFI

Thanks Greg. I put out some mails to local Suz shops to see what they suggest, what they've got. We shall see. I'll post the results and decision to keep those who care or could find themelves in the same boat, pardon the pun, advised.
Old 10-09-2008, 08:29 AM
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Default Re: Suzuki DT225 EFI

first of many questions....I bought a used 2001 DT225 I just rebuilt, , according to the seloc manual, on some dt225 the oil was injected on six pipes ahead of the injectors, my engine has the oil injection directed toward the fuel evaporator, where its mixed before the injectors...my engine has the six pipes open, not capped, and when running there is a slight vacumm on all six...is this corect, or should I cancel (cap) the pipes..?)
thanks in advance...
Xavier
Old 10-31-2008, 09:43 AM
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Default Re: Suzuki DT225 EFI

*bump* anyone?
Xavier
Old 10-31-2008, 11:50 AM
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Default RE: Suzuki DT225 EFI

Bought one a few years back and power head lasted about a month , replaced under warrenty then sold it ...

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