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Any known issues with the 350 Suzuki?

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Any known issues with the 350 Suzuki?

Old 02-11-2019, 07:22 AM
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The only issue I have with them is the prop selection, no props available for the faster boats, and the fact you need the C10 gauges instead of having everything available on the Simrad MFD’s. Otherwise great motors....
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Old 02-11-2019, 07:23 AM
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Originally Posted by cp5899 View Post
I too was a bit confused about the octane rating. I was told at the boat show this weekend that 89 octane can be used in the 350 with out issues.

Is that correct or does it need 91 octane ( no 90 octane that I know of around here)?
i have been told that 89 and even 87 octane have been run through the engine without any issue. I think 89 could be run through regularly without issue. I personally would not run anything lower than 89 through but only when I can not obtain 90.

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Old 02-11-2019, 10:19 PM
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I have the option for a 425 Yamaha and a Merc 350, but I am still leaning towards the Suzuki 350 do to fuel burn seems to be better and the 425 is just to heavy.

I appreciate the information. Only real issue I see at this point is a good service center. I canít seem to find one in my area.
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Old 02-12-2019, 04:28 AM
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Originally Posted by cp5899 View Post
I appreciate the information. Only real issue I see at this point is a good service center. I canít seem to find one in my area.
Let us know if you find one. We get calls weekly from many different people trying to find a south LA Suzuki dealer that handles more than just sales. Their sales rep frequently visits trying to get us to sign up, but we have more than enough to handle as is. Itís easy to see where they focus their attention; engine sales. Service and warranty repairs do not seem to be of much concern and it shows when someone has an issue locally. Theyíre the only engine brand Iíve known multiple people to sell the engines or the entire boat because they couldnít get any local dependable dealer service.

Good luck in your search. If you decide to stick with a Mercury, weíre always here. We can even point you towards a reputable Yamaha dealer. With Suzuki in south LA, youíre basically on your own.
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Old 02-12-2019, 06:41 AM
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Originally Posted by davidwademarine View Post
Let us know if you find one. We get calls weekly from many different people trying to find a south LA Suzuki dealer that handles more than just sales. Their sales rep frequently visits trying to get us to sign up, but we have more than enough to handle as is. It’s easy to see where they focus their attention; engine sales. Service and warranty repairs do not seem to be of much concern and it shows when someone has an issue locally. They’re the only engine brand I’ve known multiple people to sell the engines or the entire boat because they couldn’t get any local dependable dealer service.

Good luck in your search. If you decide to stick with a Mercury, we’re always here. We can even point you towards a reputable Yamaha dealer. With Suzuki in south LA, you’re basically on your own.
Well then. According to the other thread going on about dealers not wanting to service stuff they do not sell, you are a very bad dealer. How dare you take care of your customers only. How dare you give preferential treatment to your customers only.

Seems that some laws are needed to correct this problem.
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Old 02-12-2019, 06:58 AM
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Originally Posted by cp5899 View Post
I’m getting 6 years of warranty, but understand the last 3 years are from a third party company. Any issues with getting warranty done the last 3 years?


thanks


I don’t have a 350 but have a Suzuki with the 6 year plan. Haven’t made a claim, but have read the extended service document. There is a third party involved. However, I read it to say that Suzuki continues to provide the commitment through the 6 year period, but uses a third party to administer it. This appears to be different than common third party auto extended warranties. I only speculate Suzuki opted to contract the administration to avoid the overhead developing this capability in-house in the US market.
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Old 02-12-2019, 07:04 AM
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deleted wrong thread, dont want to derail

Last edited by ncor33; 02-12-2019 at 07:25 AM.
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Old 02-22-2019, 07:48 PM
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My builder said they put about a dozen on boats last year. A few probably hit near 1,000 hours and they haven’t heard of issues.
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Old 02-23-2019, 03:51 AM
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The motors are brilliant, The only negative I know of is on a stepped hull, I would not use them in this application, There is a 36 YF with triple 350 zukes on it and the motors blow out really fast if you add any trim at all to them. They need to stay tucked under. I believe the twin props need the clean water and in the above application the step creates air and the motors don't like it.
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Old 02-23-2019, 04:00 AM
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Originally Posted by alloyboy View Post
Well then. According to the other thread going on about dealers not wanting to service stuff they do not sell, you are a very bad dealer. How dare you take care of your customers only. How dare you give preferential treatment to your customers only.

Seems that some laws are needed to correct this problem.
Not so much the laws but shoujld be Suzuki holding their sellers to the mark. You want to sell you need to service and don't let those who don't service discount and kill the good shops who actually fly the flag and keep the product running.
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Old 02-23-2019, 04:26 AM
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Originally Posted by Gottarpon View Post
The motors are brilliant, The only negative I know of is on a stepped hull, I would not use them in this application, There is a 36 YF with triple 350 zukes on it and the motors blow out really fast if you add any trim at all to them. They need to stay tucked under. I believe the twin props need the clean water and in the above application the step creates air and the motors don't like it.
I've put 350 suzuki's on many stepped hull boats and never had an issue, including yellowfins. I'm sure the motors are mounted to high, we see this in rigs all the time, dealers that do not do enough 350 repowers don't understand the differences in them and how important height is. I fix these issues regularly from other dealers that just slap them on and let it ride.
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Old 02-23-2019, 04:58 AM
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Originally Posted by Gottarpon View Post
The motors are brilliant, The only negative I know of is on a stepped hull, I would not use them in this application, There is a 36 YF with triple 350 zukes on it and the motors blow out really fast if you add any trim at all to them. They need to stay tucked under. I believe the twin props need the clean water and in the above application the step creates air and the motors don't like it.
I run my df350s mostly at 35% trim. When doing 60mph I'm at 85%trim. Never do mine blow out.

I've had some issues and trying to still figure them out. I'm currently at 110 hours. Two zerk fittings rusted and I need to replace so I could lube. I'm still making oil both motors. Last oil change I kept it slightly under the 8 qts they recommend, so I had about 1.5 inches from top mark on dip stick. Last trip, made oil. Also today I'm going to go take samples out of the lower unit to see if this is water or not. But I only have 10 hours on the new fluids. Photo below with 80 hours.

Last edited by Brocnizer1; 02-23-2019 at 05:27 AM.
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Old 02-23-2019, 05:24 AM
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Sounds like a ring seal issue if the oil level is going up ďmaking oilĒ. Has this been a common issue on the 350?

My new boat is getting rigger with a new 350 (hopefully next week) so itís to late to change my mind. I hope it ends up being a good motor.
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Old 02-23-2019, 05:41 AM
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I had a pair. Two things:

1. There was a service bulletin out for them to replace the ecm and low pressure fuel pump. The early models didnít have quite enough lift pressure at idle and the engines would die after idling for long periods of time and be difficult to restart. It was fixed under warranty and the fix absolutely worked. Itís my understanding that all models currently delivered have been been updated.

2. They ABSOLUTELY need 90 octane or better. They say 87 or 89 is ok and Iím sure itís not damaging to the engines, but they have knock sensors that will retard the timing on low octane fuel. What happens is the motors run and sound fine, but theyíll have half the power and burn way more fuel. Itís really noticeable. I had a tank of 87 and I could barely get in plane and would only run 38mph wide open. With correct octane Iíd hit 50-52. Maybe this issue has been fixed also.
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Old 02-23-2019, 05:44 AM
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Originally Posted by MakoMyDay View Post
I had a pair. Two things:

this is past tense, why don't you have them anymore?
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Old 02-23-2019, 06:12 AM
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Originally Posted by cp5899 View Post
I too was a bit confused about the octane rating. I was told at the boat show this weekend that 89 octane can be used in the 350 with out issues.

Is that correct or does it need 91 octane ( no 90 octane that I know of around here)?

I have run nothing but 89 octane non ethanol in my DF350 since new with no problems. For a comparison I ran the same fuel in the DF300 I had on the boat originally. The DF350 is 3 to 5 MPH faster thought the whole RPM range than the DF300 was. So the DF350 most be making more the 300 horse power on 89 octane. I may try a tank of 93 octane to see if their is any difference. When I burn Bahamian fuel I do not notice any difference in performance or fuel economy.
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Old 02-23-2019, 06:13 AM
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Originally Posted by Brocnizer1 View Post
this is past tense, why don't you have them anymore?

He sold the boat
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Old 02-23-2019, 12:33 PM
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To be fair, lower oil looking good after 10 hours of hard use. So maybe moisture not an issue.
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Old 02-23-2019, 12:41 PM
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You can't get THT approval on a 350 yet - a new model has to be around for a least 10 years before you're not considered to be a guinea pig carrying out reliability testing for the manufacturer
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Old 02-23-2019, 02:02 PM
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Originally Posted by Brocnizer1 View Post
this is past tense, why don't you have them anymore?
sold the boat. I like the engines a lot. They were exactly what the 42 Prowler needed. Excellent grip, excellent economy. Tons of stern lift.
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