Engine idle slight vibration & strange noise

[FLJetBoater]

This video explains it all.

perfect thank you. And it’s ok to run the engines with the impellers out?

 

[sunbyrned]

perfect thank you. And it’s ok to run the engines with the impellers out?

I’ve never done that so wait for someone else to reply. I don’t see why not though.

 

[sunbyrned]

I’ve never done that so wait for someone else to reply. I don’t see why not though.

Check out #39 on this thread. He ran the engine without the impeller. I think it should be okay.

https://jetboaters.net/threads/having-engine-problems-need-help.26988/page-2

 

[FLJetBoater]

Check out #39 on this thread. He ran the engine without the impeller. I think it should be okay.

https://jetboaters.net/threads/having-engine-problems-need-help.26988/page-2

I got the jet nozzle off no problem but the impeller housing is not moving at all. Any tricks to loosen it or pull it?

 

[sunbyrned]

I got the jet nozzle off no problem but the impeller housing is not moving at all. Any tricks to loosen it or pull it?

Here’s a thread where someone had the same issue. Maybe some help here?

https://jetboaters.net/threads/bent-impeller-blade-stuck-housing.22721/

 

[Scottintexas]

Can you post a picture of what you have attached

 

[Scottintexas]

sometimes the shaft splines can get "vacuum" sealed in the coupler, you may have to try to apply some constant pulling pressure and give it some love taps to try to loosen it up but until I would see what you've done I wouldn't tell you to do that,

normally the bucket/nozzle/wear ring/shaft all come off at the same time if you just do the 4 bolts at the transom so I just want to make sure I know what you've done so far,

 

[FLJetBoater]

sometimes the shaft splines can get "vacuum" sealed in the coupler, you may have to try to apply some constant pulling pressure and give it some love taps to try to loosen it up but until I would see what you've done I wouldn't tell you to do that,

normally the bucket/nozzle/wear ring/shaft all come off at the same time if you just do the 4 bolts at the transom so I just want to make sure I know what you've done so far,

I just put it back together because I’m heading out this afternoon. But will do it again tomorrow. I removed the 4 bolts closest to me. Jet nozzle came off no problem. I took some pictures of the impeller through the housing you can see which bolt i removed in one of the pictures.

 

[FLJetBoater]

I just put it back together because I’m heading out this afternoon. But will do it again tomorrow. I removed the 4 bolts closest to me. Jet nozzle came off no problem. I took some pictures of the impeller through the housing you can see which bolt i removed in one of the pictures.

This picture from the other thread is basically where I was at.

 

[FLJetBoater]

Just a thought but are you using the plugs that your manual recommends? The only reason I ask is that for my 242, the gap is usually already within the range for the ones I use.

So I just ordered another set of plugs and a new gapper. It shows all the new ones at .033 vs the original gapper which is showing them at .028. So I imagine I opened up the old ones too much as I trust the new one is more accurate because it matches what the gaps should be. Will be putting new plugs in next weekend along with new steering cables and oil change. May try to get the impellers off again because that was super fun last time

 

[Canuckjetboater]

The torque on these plugs is very low. It is common for me to find mine just over finger tight. Hopefully you have isolated your issue. keep us posted.

@buckbuck .....torque at 18 foot pounds.

 

[mike289]

Hi FLJetboater, I was just wondering how you're making out with the vibration. I have the same year, same boat, same hours, and same issue, but in addition it wont go over 6400 rpms.

 

[FLJetBoater]

Hi FLJetboater, I was just wondering how you're making out with the vibration. I have the same year, same boat, same hours, and same issue, but in addition it wont go over 6400 rpms.

I really haven't had that much time to work on it, but been using it plenty! I don't pay attention too much to the RPM's, but I think at WOT it's approaching 8000, definitely over 7000. Finally have a few days coming up where I can try and get those pumps pulled again, but I also ordered my stereo so I might be more motivated to get that done before the long weekend.

 

[mike289]

Thanks for the reply, I'll keep following this post for updates. Have a great day and upcoming weekend!