Low speed needle shape. possilbly turning new point

[The Young Gun]

I am need of some advive. This low speed needle is from my 1967 9.5 hp Johnson model MQ-13. My original thought was that my motor was running too rich no matter how much i tried to lean it out. The best my motor has ever ran was one time I accidentally ran it out of gas. and the last three seconds before it cut out completely, it sounded strong. I thought then was the optimal fuel/air ratio

All new points, plugs, and condensers. I think timing is fine. Compression is good. Anyway, a carb rebuild kit is being shipped right now with an owners manual.

I have read the linked post but i wanted to double check.
http://forums.iboats.com/showthread.php?t=432163&highlight=low+speed+needle+shape

my two basic questions are:

Could this be letting too much fuel through?

Is there anything I can do about it to re-turn it if need be?
(I have fairly decent connections with a machine shop)

Thank you guys in advance

 

[kbait]

Re: Low speed needle shape. possilbly turning new point

While you could probably machine it and get it to work correctly, I'd call Tim's outboard 218-682-2331 with the model number of your motor and get a good, used one. They ship quick, and prices are always reasonable. Good luck. Oh, and that fouled needle is likely your main issue, although a sinking/wrongly adjusted float level would cause the same issue and run well when virtually out of fuel..

 

[Willyclay]

Re: Low speed needle shape. possilbly turning new point

my two basic questions are:

Could this be letting too much fuel through?

Is there anything I can do about it to re-turn it if need be?
(I have fairly decent connections with a machine shop)

Two basic answers: yes and yes. Any good machinest can handle this job.

Your needle is definitely damaged/eroded! Not a perfectly flat tip like I and the OP were discussing in the above linked thread. Do it now before you rebuild the carb. Good luck!

 

[rockyrude]

Re: Low speed needle shape. possilbly turning new point

Also, get real good look at the jet to make sure it hasn't been damaged also.

 

[robert graham]

Re: Low speed needle shape. possilbly turning new point

Just an idea, maybe chuck that needle in a 3/8" electric drill and re-surface the point against a fine grain flat file or stone...should be easy to do! Good Luck!

 

[F_R]

Re: Low speed needle shape. possilbly turning new point

Except for one minor detail. That needle is attached to a flex cable about a foot long. That would take a somewhat unusual drill chuck.

 

[Willyclay]

Re: Low speed needle shape. possilbly turning new point

One more time, F_R keeps us all straight!

 

[samo_ott]

Re: Low speed needle shape. possilbly turning new point

Except for one minor detail. That needle is attached to a flex cable about a foot long. That would take a somewhat unusual drill chuck.

What? Man those 9.5's are weird birds. Glad I don't have any! I like the good ole 10's. Bulletproof

 

[The Young Gun]

Re: Low speed needle shape. possilbly turning new point

thank you guys for the replys. I talked with my dad about turning the point back down to a perfect cone, he hasn't seen it yet but I did explain that there was a cable on it. He still thought he could do it. So we'll see and I'll post again after he gets done.

I hope this fixes my bogging problem. I'm just glad I found something wrong with it to try to fix it. I was really beginning to scratch my head on what to do next.

thanks again
Jacob