2017 FSH 190 Hard Start

[ReelFishingSWFL]

Here we go again.. after putting several thousand dollars into this jet boat the hard start from hell is not going away…. I went as far as putting in an brand new motor 0 hours… everything is brand new from top to bottom.. if you can think of it I replaced it smh.. I found that if I turn the key half a turn almost turn on the boat you can here the motor slightly spin wait for the ecm to turn on after the throttlebody stops humming and I then turn the ignition all the way to engage the starter fully it will then start right up.. only after I do this ritual will the motor fire up.. all my mechanics have stopped answering my calls because they can’t find the issue it’s driving me up the hill does anyone know or have any idea what I’m dealing with here? Thanks you for any advice.

 

[FSH 210 Sport]

Did you ever take this to a Yamaha dealer to troubleshoot this issue?

 

[ReelFishingSWFL]

Did you ever take this to a Yamaha dealer to troubleshoot this issue?

I did and they can’t seem to understand what’s happening

 

[FSH 210 Sport]

I did and they can’t seem to understand what’s happening

Then take it to another dealer.

By the way, does it run smoother now that you rebuilt the engine?

 

[ReelFishingSWFL]

Then take it to another dealer.

By the way, does it run smoother now that you rebuilt the engine?

very smooth no issues. Just this crazy hard start. I can’t shake. I’m getting ready to upload a video to show exactly what’s going on.

 

[FSH 210 Sport]

very smooth no issues. Just this crazy hard start. I can’t shake. I’m getting ready to upload a video to show exactly what’s going on.

Good at least that money was well spent.

Did you replace the key switch?

The video will be helpful.

 

[ReelFishingSWFL]

Good at least that money was well spent.

Did you replace the key switch?

The video will be helpful.

brand new key switch here’s the video!

 

[FSH 210 Sport]

That makes a lot more sense seeing it… you say you have replaced almost everything.. did you replace the ETV? Seems like that ETV is making a lot of noise… but I have little experience with that device but I’ve never heard that from the ETV’s on my engines..

 

[ReelFishingSWFL]

That makes a lot more sense seeing it… you say you have replaced almost everything.. did you replace the ETV? Seems like that ETV is making a lot of noise… but I have little experience with that device but I’ve never heard that from the ETV’s on my engines..

Yes, that’s a brand new throttlebody. I just took it to my mechanic he plugged in the computer and it has zero codes. We did find something the fuse box one of the little teeth connectors. Got corroded at one point and one of the tooth looks like it was eaten out by the corrosion. He advised to buy a new fuse box to see if that could be the issue. Here’s a picture to identify what I’m talking about.

 

[ReelFishingSWFL]

Here's an update... The new fuse box didn’t resolved the issue although I thought it did because it started fine on the cold start several time. I discovered something interesting. The engine has difficulty starting after it gets hot. I let it run on the hose for a while, turned it off, and tried to start it again with no success until it cools down. Once it cools down, it starts right up. I feel like I'm making progress... does anyone know of any sensors or plugs that may cause issues when the engine gets hot?

 

[FSH 210 Sport]

Here's an update... The new fuse box didn’t resolved the issue although I thought it did because it started fine on the cold start several time. I discovered something interesting. The engine has difficulty starting after it gets hot. I let it run on the hose for a while, turned it off, and tried to start it again with no success until it cools down. Once it cools down, it starts right up. I feel like I'm making progress... does anyone know of any sensors or plugs that may cause issues when the engine gets hot?

Don’t worry about what it does on the hose! If it starts and runs good on the water call that a win. Go forth and burneth fuel!

Also, if there was corrosion on those contacts you found there could be corrosion somewhere else, go through every single connector and check for corrosion, spray a little die electric grease / silicone spray on them as you re assemble after checking them to keep the water out.