the problem came backkkkkkk

[chris abela]

Hi to all. After 5 years of fun boating I have now got a problem with my engine. It runs fine when trolling and not going over 3000rpm but when it comes to running back home it runs for a few minuits and then cuts out completly as if you pulled the safety cord by the key. It would then start at once after I turn the key. We got home on low revs-3500. The possible causes I thought were that the SLOW function was kicking in, cause I felt the tell tail water a bit hot, but is'nt the slow suppose to reduce the revs not completly cut the motor. There are no warning buzzes or lights and all work on startup.<br />Ive checked the impeller and the thermostat and nothing seems to be blocking the passages. I have also grounded the tan colour wire to check that the warning light works. One thing thats funny is that usually a lot of oil comes out of the propellor when in the garage as I rinse the motor on a winterizing mix every time its used. This time there was no oil whatsoever. Ive checked the carburators clean as a whistle.<br /><br />One last thing is that before the motor goes off there is a sort of wretchet sound as though the starter is trying to engage. imm baffeled<br /><br />please help<br /><br />I'd appreciate any comments keep up the good work.

 

[rickdb1boat]

Re: the problem came backkkkkkk

Huuuummmm...What motor???

 

[chris abela]

Re: the problem came backkkkkkk

opps sorry i copied and pasted .<br /><br />its a 2000 50 two stroke electric johnson

 

[chris abela]

Re: the problem came backkkkkkk

anybody??

 

[gatorred]

Re: the problem came backkkkkkk

spark box,computer on it,maybe a coil, or plug wire, but one side of motor running isn't as fast as 3500 rpm on the 35 i had but maybe a 50 faster

 

[Dhadley]

Re: the problem came backkkkkkk

Lets start with the basics. Have you done a compression test lately?

 

[chris abela]

Re: the problem came backkkkkkk

sorry Dhadley , I was at work.<br /><br />No, have never done a compression test the enging is only used occasionally and always winterised.<br /><br />When I went out the last time I got to top WOT with no problem<br /><br />The only thing tat might be wrong is the idle mixture as I cant get it perfect

 

[fireman57]

Re: the problem came backkkkkkk

Check your spark when this happens. Take a good timing light with you next time and have someone check each wire when it does this and see if you are droppping a cylinder

 

[LubeDude]

Re: the problem came backkkkkkk

Originally posted by fireman57:<br /> Check your spark when this happens. Take a good timing light with you next time and have someone check each wire when it does this and see if you are droppping a cylinder

Ya, hes dropping a cylinder allright, all of them.

 

[chris abela]

Re: the problem came backkkkkkk

there is no change in the sound ... everything normal... its as if you turn off the key, but that sort of teeth grinding ound before it actually dies completly

 

[Joe Reeves]

Re: the problem came backkkkkkk

I assume the 2000 model has a horn alarm warning system?<br /><br />If so, grounding out that TAN wire should make the horn sound. And again if so, I'd suspect that the engine is overheating which is engaging the S.L.O.W. system if so equipped..... and that grinding sound is the pistons grabbing the cylinder walls just before seizing up.<br /><br />Something to consider.

 

[cobra 3.0]

Re: the problem came backkkkkkk

Engine not getting oil?

 

[Dhadley]

Re: the problem came backkkkkkk

Sooooo.... does this mean;<br /><br />"Lets start with the basics. Have you done a compression test lately?"

 

[fireman57]

Re: the problem came backkkkkkk

Lube Dude you are right. When he talked about it going into "slow mode" that's what it sounded like but I didn't grasp the rest when it just shuts off and makes the clunk sound.

 

[chris abela]

Re: the problem came backkkkkkk

Tan wire sounds the horn<br /><br />Engine starts up no problem immidiatly after it shuts down<br /><br />It goes no problem at 3500rpm but not at 4000+<br /><br />Warnings are there but none go off

 

[ezeke]

Re: the problem came backkkkkkk

"This time there was no oil whatsoever."<br />"...that sort of teeth grinding sound before it actually dies completly.." <br />"..... and that grinding sound is the pistons grabbing the cylinder walls just before seizing up."<br /><br />That sure sounds like no oil to me.

 

[chris abela]

Re: the problem came backkkkkkk

I think I have just found the problem. My oil tank which is situated under the seat was sort of imploded and there was a release of pressure when I opened the cap.I think the small hole in the filler cap was blocked. But the rubber primer ball was not deflated and it was hard as usual?? I think that the pressure was keeping the oil from flowing at high speed. Does this make sence?<br /><br />The tank did not come back to shape 100% after i opened it. Is it normal for a 6 year old tank to be a bit imploded after contact with oil for so long?<br /><br />I checked the plugs and one was wet and one was dry. Without doing a compression test can I know if I did any damage?<br /><br />Thanks for the replies they are greatly appreciated.

 

[ezeke]

Re: the problem came backkkkkkk

Yes,it makes sense. The pump would continue to pump the normal amount of gas, but with a decreasing supply of oil, or no oil at all. <br /><br />You may want to check with a dealer to see if there is a better cap for your oil tank.<br /><br />Regardless of other tests, get some oil to those cylinders before you run the engine again. You could take the plugs out and just work a little in from there while turning the flywheel clockwise.

 

[chris abela]

Re: the problem came backkkkkkk

thanks eze, its amasing that such a small thing like a blocked breather can ruin a motor. Ive unblocked the breather, but never have I heard on this forum that there was another problem like mine. Mind you I still have to test to confirm

 

[rickdb1boat]

Re: the problem came backkkkkkk

I'd also suggest that you run pre-mix until you confirm you are really getting oil to the engine.....