Care and Maintenance for a 2000 Suzuki DF 70TLY

[zelazknee]

Hey all, I recently purchased a boat and its powered by a 2000 suzuki DF70. I believe its true title is a DF 70TLY

I have a few questions (more like a hundred) but many of those could be answered if I had the owners manual or service manual. I guess my first question is how do I find a service manual or owners manual (PDF would be great). If I had either or I could start ordering parts for maintenance and get it ready for the winter.

I do plan on fixing and at times breaking myself.

Appreciate the help,
Matt

[zelazknee]

Answering my own questions

Service Manual:
https://www.manualslib.com/manual/12...?page=1#manual

Getting Part #s:
https://www.brownspoint.com/store/pc/suzuki/df70/01.asp

[34Ford]

I have a 2000 DF70 ( rebadged as an Evinrude 70)
I have fuel coming out the vapour separator hose at idle. I had previously had the motor making fuel, for which I replaced the low pressure fuel pump. But after reading posts on the forum, I learned it can be this causing it as well.
has anyone else had the problem and how did you fix it?
I was wondering if it might have something to do with the needle and seat.
But it looked ok when I had the vapour separator tank apart.

[Moonlighter]

You are on the right track.

needle and seat gooped up.
float set to the wrong level
float itself gone off and not floating

[zelazknee]

Is the motor struggling for gas when high fuel pressure is needed? I'm having that issue and was going to crack open the VST to replace the fuel pump and look into sticky stuff. Let me know how it goes! I too replaced the low pressure fuel pump and used some clear fuel line to see if I was getting air bubbles.... Primer bulb was going soft on me.

https://www.youtube.com/watch?v=DiI1wFTQ7yQ

This video is somewhat helpful but there are many more out there.

[34Ford]

Well I replaced the needle and seat as the old needle didn’t look that good under the microscope. I set the float level on the low side at 44mm from the face of the VST to the base on the float. Now that problem is solved. No more fuel coming out the breather. But on our shake down run, there doesn’t seem much water pressure and it was running hot when we went crabbing and not much from the tell tail. The old pump was about 9 years old and only done 52 hours, so I replaced it. It is still the same. Just dropped the thermostat and the water pressure valve. The water pressure valve was fine, but the thermostat was jammed open, so I’ll replace that. I wouldn’t think that would drop the water pressure that much, but we will see when it’s replaced.

[34Ford]

If you pull the VST off, you will be surprised how much crap will be inside. I hadn’t started mine for over 3 years and that was a big mistake. They said I should run the motor every month and now I wish I had. The high pressure pump had seized. I did clean it out and ran it through an ultrasonic cleaner, but it wasn’t perfect, so I replaced it. The genuine pump was A$460 I bought a made in Japan after market pump for A$60, then cleaned the injectors while they were out and so far so good. If you go this far, REPLACE THE NEEDLE AND SEAT! My motor is low hours, bing around 120 hrs. It will save you so much hassleI think it would be worth draining the VST, which is easy as it has a drain screw on the bottom, when you store it. This would hopefully stop the build up occurring in the bowl. So now the fuel side is fine, I just need to get the water pressure sorted out.

[Moonlighter]

Do a full water pump kit using genuine Suzuki parts. Dont just replace the impeller.

[34Ford]

It was the genuine kit, impeller, plate, gasket and key. Now I have a genuine thermostat and gaskets on order. The pressure valve was fine but the thermostat was jammed open. Let’s how we get our pressure back now!

[34Ford]

With a new thermostat, we now have water pressure again.

[zelazknee]

It has been awhile but I've spent my fair share of hours on the motor. Replaced the below:

• Drained gas from tank and VST
• fuel tank pickup
• fuel tank anti siphon valve
• fuel line from Tank to VST
• primer bulb
• Low and high pressure fuel filter
• low pressure fuel pump rebuild
• high pressure fuel pump rebuild (internal bolts seized)
• cleaned fuel injectors

The issue I used to have with surging top end power has disappeared. Trolled for a few hours and ran WOT on the river for a 2 mile stretch. Performed very well.