RDL-23 1691 40HP O.B. Please Please HELP

[Rubixone]

OK so here's the deal. last year I got the motor to run right out on the lake for about 15 minutes last year. ever since it would start and run in low idle, it would go in to gear forward and reverse. Till it died at the end of the year and wouldnt start. I have no manual so it sucks, and i am a young guy with little cash. I have read a bunch of FAQ's and alot of other reading so i come here as a last resort. this year I took the carb off and apart and cleaned it very well I think. I also took the starter off and rebuilt parts of it since last year i over heated it and seezed it sort off, but works great today(after rebuild). And the carb seems ok, my problem is this:
I can start it and run it in low rpms I also can put it in gear. this year it is diffrent though. Last year when I have it full throttle it would just stay in low, now this year when I give it full throttle it dies out at about half throttle, last year in neutral it would get high rmps, but i didnt do it alot cause i know its bad. this year in nutral it again goes to about half throttle and dies out. I started out at about 40:1 ratio on the oil mixture then took it up to about 30:1 then i got home and found out i should be using like 24:1 but I can imagine that 6:1 diffrence making that big of a diffrence. also the top needle on the carb was about 3 and a half turns out from all the way in position, and I put it back at that but i also read tonight that it should be started at about 2 full turns out. SO What can I do. Please Help, I know theres a few Gurus out here that could help.

 

[JB]

Re: RDL-23 1691 40HP O.B. Please Please HELP

Please read this, then edit your post for readability.

http://forums.iboats.com/showthread.php?t=250879

 

[tootallofwa]

Re: RDL-23 1691 40HP O.B. Please Please HELP

1691 is old...
Upper Needle (Low speed-Idle) initial setting is 1-1/2 turns off lightly seated. Lower needle (high speed) Initial setting is 3/4 turn off lightly seated.
Use 24:1, TC-3, 2-stroke oil Fuel mix. Close on the fuel mix is OK but it really needs all that oil. DO NOT RUN THE ENGINE, OUT OF THE WATER.

In neutral and reverse throttle is limited (won't open all the way.) It won't shift past half throttle either. (it is supposed to work that way)

If your engine dies when you open the throttle... It is being starved for fuel.
Could be high speed needle/jet clogged (bottom of carb bowl, where gunk settles) If you don't have a needle there, it's behind a plug. Fuel pump may not be delivering enough fuel, Fuel tank screen could be clogged or Not vented (common to forget to open the vent.)

Lots of folks here know that engine. Let us know how the engine is reacting now (after you make initial carb settings and use proper fuel mix.) My engine runs faster a little leaner than those settings.

 

[Rubixone]

Re: RDL-23 1691 40HP O.B. Please Please HELP

thanks tootallof I will try those settings, I figure if you do have something good to say don't say any thing at all, and what I poasted was necc to understand the situation.
but thanks once again toot.

 

[JB]

Re: RDL-23 1691 40HP O.B. Please Please HELP

Sorry if you were offended, Rubixone. I was trying to help you get the best results. That's my job.

Not many helpers will take the trouble that Tootall did to root out the facts from the narrative. You got lucky there.

Good luck.

 

[1946Zephyr]

Re: RDL-23 1691 40HP O.B. Please Please HELP

Coming here should be a first resort There are a lot of good helpfull guys here who are ready and willing to point you in the right path and help you avoid costly and unnecessary repairs. The Top Secret File is a very helpfull thread to look at too. Good Luck and welcome to iBoats

 

[Rubixone]

Re: RDL-23 1691 40HP O.B. Please Please HELP

ok so I have one other question, when I read about rebuilding carbs I find a lot of them refering to a "jet" that is located behind the drain valve. but when I rebuilt and cleaned my carb there didnt appear to be a jet that could be removed, It was just a smooth hole that ran under and out to the edge and up the casing to the top part of the carb. there didnt apear to be any threads for screwing in a jet. Is this right, Is my motor just so old that it doesn't work like that? thanks for your time.

 

[JB]

Re: RDL-23 1691 40HP O.B. Please Please HELP

There are many different carburetors used, Rubixone. What the jets look like and where they are changes from one model to another.

Generally, jets are what we call the tiny passages, some adjustable, some not, that control the amount of fuel flow. A typical carb has three "circuits": low speed, medium speed and high speed. On some carbs for smaller engines the low and high speed jets are adjustable.

Many of the comments about jets stem from the fact that a carb interior can look a clean as an operating room and still have invisible varnish or gum in those tiny passages changing their size or even blocking them comletely.

All those differences are one of the main reasons we urge owners to get and use an OEM Service Manual, so they know where the jets and other tiny passages are for their model carb.

If you don't have one, reprints of the original Manuals for your outboard can be found at www.outboardbooks.com.

Good luck.

 

[Rubixone]

Re: RDL-23 1691 40HP O.B. Please Please HELP

thanks JB thats what I wanted to know. thanx 4 the link 2.