Engine Surging/Not Running

Рет қаралды 9,862

Күн бұрын

I have no clue if this is your problem. But I have to share this video with everyone because this was a manufacturing issue with the computer board. The capacitor on the circuit board was smooshed on the GT-40 and 350hrs later the capacitor wire broke. All I had to do was straighten out the wire and resolder. I went through forums and technician manuals to try and diagnose my problem but the was so intermittent, nothing was working. Some days it would run like a dream (capacitor wire completing touching solder) or it would run extremely rough and die a few minutes later (capacitor wire was not completing the circuit). Please comment below if you have the same problem. I am now an expert in diagnosing these engines and would love to hear if someone has/had the same problem.
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Hello Everyone, my name is Justin White. Ever since I was young I was always fascinated with how things work. Wherever I am going, I constantly look at how and why something is working the way it is. With my KZbin channel, I am able to give accurate and credible videos to the viewers. Cluengineer or "Clue in engineer" is a guide to a solution. Many of my videos are how to, fix it, and explanation. Come join the community and subscribe, like, and share.

Пікірлер: 38

@Lancelotolink 3 жыл бұрын

That was a great video. You went all the way down the rabbit hole to find and fix the issue. WOW, good job!! 😃

@92813justin 3 жыл бұрын

Thank you. It was not easy but I finally got there.

@ChiliStyles 3 жыл бұрын

Good job knowing how to diagnose the problem and electrical work. That exhaust sounds good in the water too

@92813justin 3 жыл бұрын

Thank you, I still cant believe it. This V8 sounds so great in the water

@ChiliStyles 3 жыл бұрын

@@92813justin it does sound good. My moomba has straight dual exhaust but in the water it’s extremely quiet at idle. Almost can’t even hear it

@bradenwuesthoff5639 3 жыл бұрын

Nice work! Anytime you have a surging issue, always hook up an inline fuel pressure gauge, drive the boat and watch the gauge when the surging happens. You would see low fuel pressure, then you could hook up a meter to the fuel pump and see its voltage is cutting out while its surging. The ECM probably gives the fuel pump relay a ground to activate it which makes sense the ECM was damaged

@92813justin 3 жыл бұрын

It was so hard to find this but I am glad it is all fixed.

@wtrskrs 3 жыл бұрын

Great job! The previous owner on my '97 said that it kept dying when they were in Tahoe, but no place else. They said it was one of the relays so they kept a couple on board. I've had the boat for two years now and haven't had a problem (nor on my '96 that I put 1600hrs on from new). But good to know that it's fairly easy to get to the PCB. My '96 I kept in a garage since new so the engine looked pristine even at 1600hrs. The previous owner kept it outside and covered, but it appears they never opened the engine compartment to reduce humidity, because every bit of aluminum is severely oxidized. I'm hoping all of the connectors (especially the one to the ECM) are good; I'm afraid to pull it off in case it falls apart.... Just subscribed. Appreciate the video. Love learning from someone with a bubble but SN with a GT40!

@92813justin 3 жыл бұрын

Wow, 1,600 hours and still running hard. I’m glad to here it! See you on the water!

@cliffardo71 2 жыл бұрын

I have been having a surge and slow firing problem with my GT 40. Just ordered a new computer as I am not as handy with a soldering iron as you are. I am definitely going to pull the old one apart and look at it once the new one arrives. Great video thank you

@92813justin 2 жыл бұрын

I hope that fixes your problems

@cliffardo71 2 жыл бұрын

Good video and good work. I wish I would’ve seen this video and give me some effort to fix mine before I bought the used one. I had the same issues for a few years as you guys.

@92813justin 2 жыл бұрын

Thanks 👍

@ar5000 Жыл бұрын

Thanks for posting. That looks like the crystal that provides a 15 MHz clock cycle to the CPU, not a capacitor.

@jerryholzhammer1030 3 жыл бұрын

Nice job finding the issue. By the way it is not a capacitor but a crystal. Used to generate specific frequencies.

@MacQuiddy 3 жыл бұрын

Awesome video, just watched the “tips on driving an inboard” and learned a lot! Also- my family has a cabin about 200m towards the lake from that ending clip (PML)

@92813justin 3 жыл бұрын

We will be on the lake this summer. Say hi!

@bird.1980 9 ай бұрын

Just bought the same boat but in masters green. 1997 Nautique

@bigben5246 2 жыл бұрын

Thanks for another option in my arsenal. I have a GT-40 in my 1998 Air Nautique and occasionally it won't fire on petrol (I'm in the UK) but it'll run fine on LPG as it's dual fuel. Even knowing that the spark and ECU are fine it's still been difficult to trace the intermittent start/not start issue on petrol. Recently picked up a Carter P4389 and it's been fine since replacement, but I'm still not convinced that was the root cause. The relays I got as part of the diagnosis, direct from Nautique Parts, are 4RD 007 794-31 that might be easier to get hold of than the original part numbers. Hopefully that might help others that happen across this video

@92813justin 2 жыл бұрын

Great insight