1975 evinrude 9.9 fuel pump prob?

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

I'll sure try it in the mornin, Will. I'm fairly certain that compressed air went through there, but if I were to use a solvent it might just open somethin up. I'll let it soak a while, too.

I looked around for a "new old stock" 15hp carb today. My local dealer says that the last year it was available was 2007. He also said retail list price was $319.99! I told him I was glad he didn't have one, LOL! I guess if I can't get this one cleared out, I'll start with a used one & a prayer! I have nothin to lose, right. I'm also thinkin I might drill out those lead shots. It will probably find the problem, but I don't know how to put em back yet.

 

[bktheking]

Re: 1975 evinrude 9.9 fuel pump prob?

You stick the new lead shot in the hole and tap punch to flatten, very straightforward.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

Cool, Thanks Bktheking. I think I'm gonna drill em out today. Somethin has to be in there. To my knowledge, it hasn't ever been done. It hasn't ever been necessary.

 

[jmendoza]

Re: 1975 evinrude 9.9 fuel pump prob?

Have you removed the large welch plug on the top of the carb that covers up the low speed circuit orfices? If not, do so and clean out the pocket it covers real good and blow all the passages clean. I have never had to remove the lead shot plugs, normally all those passages come clean quite easily after a good soaking in carb cleaner, a hot water rinse and blown out with 125 psi air.

If you did remove and replace the welch plug, it may also not be sealed. It has to be put in placed an peened with a flat punch, but not so much that it gets concave in the middle, as then it will not seal and leak air. You could put some sealant over the plug and see if things change, if they do it's leaking and needs to be replaced. I use Yamabond 4 on the edges of these plugs as its gasoline proof and garantees a seal everytime. Silicon & Permatex form-a-gasket seal will soften and leak: its not gasoline proof.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

Jmendoza, thanks. I went through all the soft plugs, & replaced em. cleaned out all the little holes below the big one too. The manual says not to "dip" the carb so I didn't. Until now I've never had to pull the lead shots either. This carb has been cleaned several times over the years. This is the first time it has ever given me this much trouble. I sprayed it heavily with carb cleaner & let that sit overnight. The next day I sprayed it again & blew it out with compressed air. Let dry & re-assemble. This has worked every time for years. Not this time, though, & I can't really explain why.

I drilled out the lead shots today & cleared all the idle passages. I didn't really see anything major enough to clog it up, though there was a bit of greyish-brown stuff in a couple of em. It didn't seem very thick or appear to have been enough of it to clog anything. I've passed the tiny drill bit through them all & they are soaking with sea foam deep creap tonight. Tomorrow I'll spray em with carb cleaner & then compressed air. Let dry & re-assemble. If all goes well, I'll be able to give it a try late tommorrow evening. Gotta go get soft plugs & lead shot in the mornin.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

Just tried that carb & it didn't help. Maybe idles a few more seconds, but still dies below 1000rpm. I have no idea what happened to it. Maybe it's just tired of carburating!? I'm gonna put the adhesive in the pic below over the soft plugs & the lead shots in the mornin, & try it again. It claims to be gasoline & oil "resistant". I bought it from OMC to seal the lower unit. If this isn't good enough, yall let me know & I'll get somethin better.

Also bought a 15hp carb from ebay last night. Supposed to be "new old stock". I plan on puttin a kit in it anyway, but I hope it's what he said it is. It shipped today.

 

[dazk14]

Re: 1975 evinrude 9.9 fuel pump prob?

Scanman,
To ensure you bought the right carb, I searched ebay for completed listing and couldn't find anything that fits your application.

Post the auction, so we can give you the approval. I hadn't tuned in to this thread for awhile, because I've got a few good 15HP carbs.

They're like gold, but I've known to be a soft touch at times .

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

I hope it's the right part no. he posted. I can tell ya that the number is for a 1975 15hp evinrude. I wrote the numbers down before I started shoppin so I'd know what to look for. The cam follower roller is a different color, & maybe a different circumference, but I've got my old one. The S/S needle is still in it too, if he ships it that way. Can't ever tell by the pics, but he's got good feedback, & if he wants to keep it that way.... Also the add says "offering refund-US only" so, hopefully, if it isn't what he thinks it is, I can get a refund, & then start jumpin UP & DOWN ON YOUR SOFT SPOT!!! JUST KIDDIN!!! Yall tell me if it aint right please!

http://cgi.ebay.com/ebaymotors/ws/e...0713774988&viewitem=&sspagename=STRK:MEWNX:IT

Thanks dazk14

 

[bktheking]

Re: 1975 evinrude 9.9 fuel pump prob?

To hard to tell, no pic of the carb throat. What I can tell you is that the roller is correct for a 75, they switched to a black roller in later models.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

Thanks bk. I didn't know that. Now I'm wonderin what carb I'm actually foolin with on this motor. I'll have to check the part number on it today. Yea, I, too, wish we could see the throat!

 

[dazk14]

Re: 1975 evinrude 9.9 fuel pump prob?

The seller misspelled CarburAtor (CarburEtor) making his listing tough to find and why it was probably still available - which is good. Used they run $140/150.

When you get it remember 2 holes in choke plate 15HP, 1 hole 9.9HP.

You've got no worries, since I've got one here for you,...but it will be interesting to see if it's a 9.9HP motor upgraded to a 15HP, hence the wrench marks on the 9.9 dropped into the 15 box and not labeled.

If so, I'm sure you would have no problems getting a refund. The guy has great feedback and I'm sure he'd feel badly sending the wrong part.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

Thanks dazk14. It will be interesting indeed.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

Sealed off all the lead shots & soft plugs yesterday (see pic). Still no change, can't imagine where the problem might be! Can't wait to get the 15hp carb. Hope it is as advertised!

 

[jmendoza]

Re: 1975 evinrude 9.9 fuel pump prob?

You do realize the spring between the throttle cam follower and safety lockout pawl on the starter is missing?

 

[bktheking]

Re: 1975 evinrude 9.9 fuel pump prob?

NLA Spring, would just cause a locked starter wouldn't it, shouldn't hurt the running, mine doesn't have the spring either.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

I just didn't put it back 'cause I knew the other one was on the way. Yea, all it does is lock the starter when the tiller goes past the start position.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

New carb just got here! Two holes in the choke plate and large throat! I'll post a pic or two. Then I'm gonna go put it on.

 

[scanman]

Re: 1975 evinrude 9.9 fuel pump prob?

Here's the pics. It looks great to me! Brand new! Check out thepart number in INK still on the mounting flange!

 

[bktheking]

Re: 1975 evinrude 9.9 fuel pump prob?

nice carb!

 

[OptsyEagle]

Re: 1975 evinrude 9.9 fuel pump prob?

That motor is going to fly.