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Suzuki 175 Troubleshooting

Old 05-04-2019, 01:48 PM
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Default Suzuki 175 Troubleshooting

interesting combination

Initially the engine wouldn’t run over 3,000 rpm. I replaced the neutral switch thinking that was the problem. Problem persisted.

With the cowling off and motor in gear, if I click the “button” on the neutral switch one time the engine will start to rev up. If I put it back in neutral I have to click the neutral switch again by hand.

Heres the second problem....once the motor revs past 3,000 it “bogs” around 4,000 acting like its down a cylinder or something. It doesn’t sputter or sound odd but it doesn’t want to run at the normal range.

Im stumped.
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Old 05-04-2019, 02:35 PM
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No lights or alarms.
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Old 05-04-2019, 02:37 PM
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This problem started suddenly?
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Old 05-04-2019, 02:58 PM
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Ran the boat one trip and no issues, next trip it wouldn’t exceed 3,000. Replaced switch and on the water now trying to figure this out. Yep, came on suddenly.
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Old 05-04-2019, 03:29 PM
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Same problem to me, but on yamaha f40get, I can't exceed 4,200 and I can't understand why. Last time there were working on 6,000.
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Old 05-04-2019, 03:56 PM
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What model year is this engine?
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Old 05-04-2019, 04:53 PM
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What binnacle are you using?
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Old 05-04-2019, 05:05 PM
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Originally Posted by kim chi View Post
What binnacle are you using?
​​​​​​This one



https://en.m.wikipedia.org/wiki/Binnacle
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Old 05-04-2019, 05:21 PM
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The binnacle is a Sea Star dual lever control(with upper station). Engine is 2016 model year with around 150hrs.
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Old 05-04-2019, 05:24 PM
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are you running any gauges than can throw a code that you can read
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Old 05-04-2019, 05:27 PM
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does this year have the IAC valve? my zuke is older but was displaying the exact same issues and that's what my mechanic came up with and a new IAC did the trick.
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Old 05-04-2019, 05:36 PM
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Originally Posted by ozmako View Post
are you running any gauges than can throw a code that you can read
no codes flashing on the standard gauges

I’ll check the shop manual for IAC.
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Old 05-04-2019, 05:40 PM
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Sounds like the neutral switch isnt fitted/aligned properly or there is a problem with its wiring.
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Old 05-04-2019, 05:40 PM
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Originally Posted by champc1 View Post
does this year have the IAC valve? my zuke is older but was displaying the exact same issues and that's what my mechanic came up with and a new IAC did the trick.
yes there is an IAC valve controlled by the ECM according to the shop manual.
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Old 05-04-2019, 05:40 PM
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Originally Posted by smccormick View Post


​​​​​​This one



https://en.m.wikipedia.org/wiki/Binnacle
That binnacle sucks, get rid of it.

I have the Morse controls with an upper station, which are like the Suzuki and Sea Stars, I believe. Just found out about a month ago that there is a "Trolling Mode" on them where if you are in gear at low rpm's and accidentally hit the neutral button it will limit the engine power. Try putting the engine in gear and hit the neutral button again, then see if you have full throttle. With everything else you cannot be in gear to select, so it is not intuitive to make selections while in gear. Does that make sense?
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Old 05-04-2019, 05:43 PM
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Originally Posted by Moonlighter475 View Post
Sounds like the neutral switch isnt fitted/aligned properly or there is a problem with its wiring.
i agree this seems to be the issue with the limit at 3,000. It is exactly like having the engine in neutral. What has me stumped is I can reach in with my finger when the switch is open(in gear) and tap the “button/switche” once and it’ll run. When I cycle it back to neutral with the binnacle and then in gear again I have to repeat that process because it still thinks it’s in neutral even though the switch is clearly open.
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Old 05-04-2019, 05:44 PM
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Originally Posted by txtightline View Post


yes there is an IAC valve controlled by the ECM according to the shop manual.
The IAC controls the fuel at idle speeds, nothing to do with the engines performance at higher revs. IAC acting up usually sees the engine stalling when started or when pulled back into neutral after running at speed.

The fact the engine revs up after you push the NTS button is telling you something.

5 minutes on a Suzuki SDS system used by an experienced Suzuki mechanic would pinpoint this problem and have it sorted.
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Old 05-04-2019, 05:47 PM
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Originally Posted by kim chi View Post
That binnacle sucks, get rid of it.

I have the Morse controls with an upper station, which are like the Suzuki and Sea Stars, I believe. Just found out about a month ago that there is a "Trolling Mode" on them where if you are in gear at low rpm's and accidentally hit the neutral button it will limit the engine power. Try putting the engine in gear and hit the neutral button again, then see if you have full throttle. With everything else you cannot be in gear to select, so it is not intuitive to make selections while in gear. Does that make sense?
makes perfect sense but these are mechanical controls and no troll mode on them.
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Old 05-04-2019, 05:49 PM
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Originally Posted by Moonlighter475 View Post


The IAC controls the fuel at idle speeds, nothing to do with the engines performance at higher revs. IAC acting up usually sees the engine stalling when started or when pulled back into neutral after running at speed.

The fact the engine revs up after you push the NTS button is telling you something.

5 minutes on a Suzuki SDS system used by an experienced Suzuki mechanic would pinpoint this problem and have it sorted.
keywords there are experienced Suzuki mechanic.....those are unicorns in north Texas. But I’m about done with the tinkering I’m capable of.
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Old 05-05-2019, 05:24 AM
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I think I can help you out with the experienced Suzuki mechanic . We are the largest repower dealer in Texas so if you are willing to make the drive to Houston we could resolve this Issue under warranty.
Call or text me @ 281-960-0696
Josh
txoutboardsource.com
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