surging issue

W

wellcraftv20step

Senior Member
hey all, after getting a reluctant clearance from my surgeon im getting ready to splash the Deplorables. she has been running great in my boat driveway the 3 or 4 times I ran her over the last few months, but when I went out to just start her before splashing she is now surging when I bring her up from idle. I decided to give a look at the vst filter and oxygen sensor. the vst filter looks good to me , very good actually. the o2 sensor looks good as well, installed new water fuel separator too . I for the life of me cant believe the price of the vst filter ! Anyway , what else should I be looking for
 
I'll be running the motor off a different /fresh supply of fuel this weekend just to eliminate that as the cause . I have a feeling that I'll just have the same results with the surging . I've noticed that the rpms at idle have gone from its normal 600/700 when warmed up to 900/1000, seems as though the motor is compensating some how. Going to look toward fuel injectors after that .
 
If you think it is injectors...run a bottle of Redline SI1...if it clears up afterwards, you had dirty injectors, if you still have the same issue...its not the injectors most likely.
 
As I mentioned a week ago I tried running her on a fresh outboard tank and had the very same issue. So I pulled the injectors and msent Them out. Got them back today and now she's purring like a kitten again ! As Phil Robertson would say, Happy Happy Happy !
 
This may sound like a silly question but does anyone know if the cowling gasket is supposed to remain on the top or bottom cowling. And should it be affixed as mine falls off every time I remove the cowling . It always sticks to the top cowling but just before I set it on the deck the gasket falls off, drives me nuts. I'm going to get some kind of automotive weatherstripping epoxy and set it in that I think..
 
wellcraftv20step said:
This may sound like a silly question but does anyone know if the cowling gasket is supposed to remain on the top or bottom cowling. And should it be affixed as mine falls off every time I remove the cowling . It always sticks to the top cowling but just before I set it on the deck the gasket falls off, drives me nuts. I'm going to get some kind of automotive weatherstripping epoxy and set it in that I think..
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John, rather than epoxy which will make removing it almost impossible if you want to replace it, I'd use RTV Silicone seal, or pretty much any silicone sealant. That way if you need to replace the gasket at a later date it's a fairly easy removal. With Epoxy that sets hard removal is going to be a nightmare. :head:
 
wellcraftv20step said:
This may sound like a silly question but does anyone know if the cowling gasket is supposed to remain on the top or bottom cowling. And should it be affixed as mine falls off every time I remove the cowling . It always sticks to the top cowling but just before I set it on the deck the gasket falls off, drives me nuts. I'm going to get some kind of automotive weatherstripping epoxy and set it in that I think..
Click to expand...


Supposed to be on the top cowling. I got a new one on Boats.net for $50-$60.
 
Makes sense skunk, it would be awkward on the bottom cowl. Paul I was just going to apply it to certain points I wasn't going to go all around for that reason. But your rite silicone would be best ! Thanks men.
 
Well my surging issues are back again,, obviously need to do a fuel pressure test and go through that ignition system. Problem is This is not easy for me .ive got a 7:45 MRI of my neck again this morning because As unbelievable as it may seem just 4 months to the day of my spine surgery I'm having terrible pain in my left arm shoulder and hand again and the weakness is getting worse ,I may just call someone in so I can just be done with this problem and have one less thing to obsess over haha.. ..
 
wellcraftv20step said:
Well my surging issues are back again,, obviously need to do a fuel pressure test and go through that ignition system. Problem is This is not easy for me I've got a 7:45 MRI of my neck again this morning because As unbelievable as it may seem just 4 months to the day of my spine surgery I'm having terrible pain in my left arm shoulder and hand again and the weakness is getting worse ,I may just call someone in so I can just be done with this problem and have one less thing to obsess over haha.. ..
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Ugh on the returning pain John. You know..... Sometimes that comment about calling someone in is the best answer, even if it doesn't sound like it at the time. Hope all turns out okay with the MRI. :pray:
 
After all my frustration of not being able to track down the problem on my Yamaha I just learned that it was all self inflicted, I'm embarrassed to say that after I did the injectors and plugs amongst other things ,one of the wires was not seated properly on the spark plug! I guess I need to slow down a bit and pay more attention! She's running real well..
 
There is nobody here that hasn't had that happen. If you are like me, the relief of finding it out weighs the sense of frustration that it was right in front of you. You are different from some of us because you will admit it. Glad you figured it out.
 
Greyduk thanks, I ve never seen any point in not admitting when ive done something stupid, sure its a bit embarrassing but life goes on God willing. I will say I do remember feeling rushed to get my grandson to his Hockey game that afternoon, what the heck ill just blame it on that hehehe!
 
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