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Old 13-06-2024, 18:07   #1
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Suzuki DF20A Won't Idle

I'm having trouble with my 2017 Suzuki 20 tiller. It won't idle, will just die if you let it. If you give it throttle (over ~200rpm) it's fine, runs fine all the way up. I'm wondering if it could be the IAC valve (also not sure if it could be the TPS), but I am getting readings from both sensors with my cable/software just not sure exactly what I should have. If you try to remove the IAC sensor wire the idle does change a little but still tries to die. Injectors were just cleaned with no difference. Anyone have or heard of this problem with these motors (9.9/15/20)?
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Old 13-06-2024, 23:34   #2
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Re: Suzuki DF20A Won't Idle

You don't say what you have already done if anything so:
1 New fuel and fuel filter
2.Brand new spark plugs
3.Check wiring connections
4 Grease linkages



These eliminate the most common issues.
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Old 14-06-2024, 04:59   #3
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Re: Suzuki DF20A Won't Idle

Suzuki Outboards: ➥ https://www.suzukimarine.com.au/owners/manuals

Service Manual: DF20A, DF15A, DF9.9B, DF15 Power Unit Mechanical [14][Df20A, Df15A, Df9.9B, Df15]
https://www.crowleymarine.com/d/tech...9500-89l00-01e

Set-Up Manual: DF9.9B/BE/BR/BT, DF15A/AE/AR/AT, DF20A/AE/AR/AT
https://www.danssouthsidemarine.com/...9b-15a-20a.pdf






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Old 16-06-2024, 16:13   #4
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Re: Suzuki DF20A Won't Idle

Yes, new fuel and filter, spark plugs, messed with map, tps, and iac sensors, and seem to be getting readings from software. I did just order an IAC valve to try first. Thank you for the link to the service manual. Just found out this motor doesn't use pushrods and I will be changing the valve stem seals soon as well to see if that fixes the little bit of oil smoke I've been having at startup. Thanks for the replies.
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