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Hello everyone, new to the site so thanks for having me, I've got a doosie of a first question for you. My engine is not getting fuel to #4 cylinder. I've cleaned carbs and set floats to manual specs. Tore that side apart Friday afternoon and saw that 4 reeds were opened about a eighth of an inch. Pressed them back closed and also noticed the screen that gives that carb fuel had what looked like dried pine sap in little rock formations in it so i cleaned the screen and throttle body really well. Blew air through all passages and fuel rails on that side and put back together. Cranked it up and it worked as it should, could remove wire from plug and hear the tone of the engine change. Thought i had it figured out and fixed. WRONG! Took boat out this morning and after about 10 minutes of riding I decided I'd check to make sure it was still working right, it wasnt. Once again, #4 not getting fuel. Is there anything I'm missing? I checked the cone shaped filter thats in the engine and it had a very small amount of trash in it but cleaned it out and that didn't help. Im almost at my wits end with this thing. How could it just stop working again overnight? Please help.
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Check the compression and spark. If compression on that cylinder is flawed, that would also affect the crankcase pressure that forces fuel to that cylinder.
The spark (with plugs removed) should jump a 7/16" gap with a strong blue lightning like flame... a real SNAP! The gap is important.
In cleaning the carburetor.... If you did not remove the brass high speed jet that's located horizontally in the bottom center of the float chamber to manually and carefully clean it with a piece of single strand steel wire... do so as solvent alone just doesn't do that job properly. Also keep in mind that floating debris (fuel lines breaking apart, etc) will easily be drawn down to clog that jet. Fuel must flow freely through that jet before it gains access to any other passageway.
Check also that the carburetor is actually having fuel delivered to that float chamber... no intermittent clogs, float needle valve jams, etc.
The four reeds that you mention being open 1/8".... that is a happening that's unheard of. I've not encountered that in my 30+ years experience... one leaf/reed maybe due to something getting drawn in and caught... BUT... four with nothing holding them open indicates something not as it should be. And it should be impossible to simply press them back into shape.
If it were me, I'd take that reed plate apart and at a minimum flip that leaf valve over so that it shuts properly.
Note that I retired in 1991 so various areas of your 98 model would be foreign to me but the fuel delivery procedure would be the same. -
Compression on that cylinder is 123psi and other three are at 125. Have a spark checker and spark will jump a 3/4 inch gap. Strong blue bolt. Ive had the carbs off 3 times making sure everything was clear, shot compressed air through the bottom jet as i dont have a flat blade screwdriver small enough to remove the jet but will be buying one today. New fuel lines from gas tank to cone filter located in the motor. I wish i could upload a pic of the reeds but the site i was using wants me to buy a subscription at the cost of 400 a year. Do you use a site to upload pics. While i had everything off i should have cleaned the whole fuel system. Thank you sir for the reply. Im going to try to find a site that will let me upload pics. I have pics of the reeds and video of the spark jumping the gap.Comment
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Two others are open that you cant see in pic.Comment
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Join "Photobucket" a free site to upload all your pictures, and from there you can transfer your pictures anywhere, including here. The free portion is sufficient, but if not, you can also subscribe for $25 per year. Look it over.Originally posted by Bjsmith919 View PostComment
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Yes sir, I was using photobucket until yesterday. Tried uploading a picture and was rerouted to a page saying i had to buy a subscription at the cost of $400 a year. I didnt see the part where you could pay monthly but will go back and check it out.Originally posted by Joe Reeves View Post
About those reeds, you said before the pic that youve never seen that problem before. After seeing the picture, what do you believe would have caused it? Im going to flip them as you suggested just curious to know what you think of it. Couldn't find the video of the spark but will get one when i get off work and upload it. Ive also moved coils around, put bottom on top and it didnt help.Comment
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Also is there anything you would recommend putting in the cylinder to keep it lubed while im running my tests?Comment
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Are you saying that it was "Photobucket" who was going to charge $400 per year... OR... some other site that you were transferring a picture to?Originally posted by Bjsmith919 View Post
Also, I didn't say anything about a monthly method of payment... where did that come from? The $25 charge I'm sure you know is a annual fee.
I've received no pictures from you on this site so far.
Lube for cylinders while running tests.... the present mixture in the cylinders should be sufficient. There's still plenty in the crankcase that the pistons would still be drawing on.Comment
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The one of the reeds at 11:11am didnt show up? I see it on my end. And yes sir, yesterday on another forum when i tried to post a picture photobucket rerouted me to a subscription page that said annual cost was $400 annually.Comment
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Did it show up that time?Comment
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Yes, but it was so large that I had no idea what I was looking at. I usually resize my pictures so that the pixel width is somewhere between 600 and 1000.Originally posted by Bjsmith919 View PostComment
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Ive got to figure out how things work on this forum and we must not be seeing the same thing. The second pic i uploaded, seems to be the first pic you've saw, is actually very small on my end. From what you can tell from the pic, do you think that has anything to do with my problem?Originally posted by Joe Reeves View PostComment
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