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Hello all, I have been lurking for a while and finally decided to join. I recently bought a boat with 225 efi Suzuki that had no spark, got a great deal on it so I could no pass it up. Found out that the rectifier was bad due to some melted wires coming from the rectifier going to the stator, bought a used one on eBay, installed it and next thing you know the motor fired right up but it was idling really high at around 1900-2000rpm. I backed out that idling screw some and was able to bring it down to 1000rpm. Took it out to the lake but I could not go pass 1500rpms, it would bog down. From what the previous owner told me, he replaced all plugs, checked compression and all cylinders were within 10%, he just couldn't figure out the no spark issue he stated. Could the bad rectifier cause a no spark? I haven't done anything else to it besides the new rectifier, but I guess they are some other things that need some attention since its bogging down under load. Thanks in advance for your help.
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Got some fuel from the water separator today, could this be my problem how does it look?Last edited by stratos20; 08-14-2015, 05:11 PM. -
Looks like ethanol that has separated. if you have a portable tank, could try cleaning filters on motor, pumping some fresh fuel through system, while draining the old, then try running some fresh fuel with sea foam, it might clean the rest out?
Good luck.Comment
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I agree that it looks a lot like like phase separated ethanol gas. Happens when ethanol fuel gets too much water into it, then the ethanol and gas separate into 2 parts, neither of which now are at all suitable to run through your engine.
You could get it tested or checked locally to be certain, and if it is, you need to empty it all out of the tank and clean the tank out. It can't be revived or refreshed. Then run clean fresh fuel through the lines and change all the filters in the fuel lines and engine.
Worth paying particular attention to the lines from the tank to the engine, as they may be internally damaged by the ethanol too.Comment
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Will run on a portable tank and report back on how it does thanks.Comment
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Buy a new motorComment
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Sorry! It's just the best thing to do in all reality! Had a 98 Merc which I got on my boat used in 06, ran until last fall and it was a great motor but gas sucker even being an efi, put a 300 on last fall and I'm gettin well over 3.5 mpg now and it's only getting better, 70 hours on it, only burn 10-15 gallons running way offshore to troll! Was a win win! Merc ran great but the zuk I have now makes fishing more economical!Comment
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Well ran it today on portable tank with fresh fuel and also added some sea foam, emptied the vst tank, cleaned the filter and still ran like crap, could not get on plane without bogging down and motor shutting off, barely made over 1200rpms so you could say I was just idling around pretty much.Comment
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Pulled plugs today as well and 2,5,6 looked pretty clean like they were not firing? Possible bad coils or stator?Comment
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Do you have a timing light? Can you run on muffs, and check spark for each cylinder with the timing light? All you're looking for is consistent flash from light on each plug wire. This will tell you if no spark on those plugs.
I'm still thinking fuel issue, because of the picture you posted.
When you cleaned fuel system, did you clean the high pressure filter, located just inside the hose to the HP pump at bottom of vst?
After cleaning HP filter, the next check would be fuel pressure at the fuel rail, and it is possible that trash is blocking some of your injectors. Try this after cleaning HP filter, mix a spray bottle with 50 to 1 oil mixture, run motor on muffs, raise idle a little, and spray a little fuel/oil (shake first) into throttle body. What happens? Spray a couple times to see what the difference is with motor running. If motor speeds up, injectors may have trash in them, if motor bogs down, maybe cleaning HP filter helped.
Post back what you find.Last edited by Solarman; 08-20-2015, 08:45 AM.Comment
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I did not clean the HP filter when I ran it yesterday, did clean it today and the fuel that came out was black and dirty, had to flush it like 10 times until I got clean fuel out of it. Should I just replace it? I will try the spray bottle and report back thanks for your help so far.Comment
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If that dirty, then put screen back in, reconnect that line. But before running it again (find the hose off the top of fuel rail(s), and disconnect that line (rubber hose) that goes back to the vst (disconnect it at the vst). Put that line into a jar/ container, and turn the key on to the first position. The HP fuel pump should push the old fuel out of the fuel rail into the container. Only turn the key on for 3-5 seconds. If fuel doesn't come out clean yet, do another 3-5 seconds. This should clear the bad fuel out of the rail. Reconnect the hose back. Then fire it up on muffs, if not running better, try the squirt bottle like I said.
Once you clean that hp filter screen, it should be fine, unless it is torn. If not torn reinstall it.
Let us know how it works. good luck.Last edited by Solarman; 08-21-2015, 12:30 AM.Comment
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Does the hp filter have a filter inside, does it come apart? Would you suggest cleaning the vst tank and injectors as well or it won't be necessary?Originally posted by Solarman View PostComment
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I told you this earlier
When you cleaned fuel system,did you clean the high pressure filter, located just inside the hose to the HP pump at bottom of vst?
And you replied
I did not clean the HP filter when I ran it yesterday, did clean it today and the fuel that came out was black and dirty, had to flush it like 10 times until I got clean fuel out of it. Should I just replace it? I will try the spray bottle and report back thanks for your help so far.
The HP filter is that screen inside the hose at bottom of vst going to the HP pump.
Clean that screen, then do the next step I wrote to you in the next message.
Then post back after you did these things I mentioned.Comment
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