Re: [OMC-Boats] carb question....bittersweet weekend outing

andy... not sure what engine you have.....but i have exactly the same
problem.... move the throttle slowly and I can get almost 30 MPH on the
GPS...

was thinking of replacing the carb altogether as i have cleaned and soaked
it twice..............Dan...........spark arrestor ?????

----- Original Message -----
From: "jd" <jdood@...>
To: "Evinrude & Johnson Boats of the 1960's and 70's"
<omc-boats@...>
Sent: Sunday, June 21, 2009 10:38 PM
Subject: Re: [OMC-Boats] carb question....bittersweet weekend outing

> Thanks andy - marking starting points is a good idea.
>
> i'm still trying to see if i can pinpoint more what's going on before i
> start twisting those screws. I had a interesting weekend with the boat.
> Camped next to a huge lake. A huge lake that looked like a miniature
> ocean, was very choppy and had about 2 other boats on it. And there
> I was with a boat that I wasn't accelerating up to plane and stalled out
> a few times when tested a few days before. But nothing ventured nothing
> gained, right? First and foremost - it started right up, and ran well
> enough to take family members out for short little spins around in the
> whitecaps. Just getting to that point and being out there zipping
> around was a huge milestone for me.
>
> As far as the carb/ running thing......I ran it the whole time without
> the cowling on. It didn't completely fix things, but seemed to run a
> bit better. So air supply is a partial problem and will be easily fixed
> when I soon vent the cowling. (and clean the spark arrestor) Next,
> fortunately the throttle didn't completely bog when I would just move it
> slowly up in increments. I'd move it a little, take my hand off,
> and then let the engine sort of "catch up" to where the throttle was set,
> then move it some more, until eventually was cruising around at almost
> full speed. And the best part is the temp was always holding solid at
> 160-170. So FUN! My last boat was an '80 Glastron with a Johnson
> 110 outboard, and this '64 Deluxe seems to be faster and handle the chop
> a bit better - love that. So, even though it wasn't running tip top,
> it was enough to get by with and I was on cloud nine. Then of course
> doom had to strike. I was on my last run heading back towards the dock
> (fortunately) at almost full throttle when it started to sputter a
> little.........i instinctively glanced at the brand new temp gauge and it
> was pegged (somewhere over 250). Yet water was flowing through the
> hoses just fine. (I still have my clear hoses on from all the previous
> testing). Immediately shut it down. Felt the manifolds, top of
> water pump - things were hot, but nothing close to 250 degrees. Waited
> 2-3 minutes and then started it back up and went very slowly back to the
> ramp. It started right back up, nothing to weird with the way it ran.
> So hopefully I didn't do any permanent damage.
>
> So now I don't what is up. Turned the key on after it was cold, and
> temp gauge reads 0. All wires still connected in back. Guess I'll
> take it back out this week for some more testing and see if it climbs
> right up to hot, or holds at 160 for awhile and then jumps up to hot.
> No matter what, I am getting a temp gauge with a built in buzzer
> warning.
>
>
>
>
> On Jun 19, 2009, at 4:39 PM, Andy Perakes wrote:
>
>> Tuning a carb is more art than science. Since its already running bad,
>> you won't hurt anything by messing with it. Its helpful if you keep
>> track of the original positions in case you get too far off and need a
>> "known running" spot to return to: It can be easy to lose count from
>> where you started so I usually run it all the way down, keeping careful
>> count of the turns. This gives you a reference point to work from. It
>> can also be helpful to know how many turns until the needle pops out so
>> it doesn't inadvertatently pop out unexpectedly and cause something to
>> get lost. Pulling it out gives you the change to inspect for
>> contamination, varnish build-up, etc. too. Just be careful you don't
>> lose the darn things -- tie a string on them if you have to.
>>
>>
>> ----- Original Message ----- From: "jd" <jdood@...>
>> To: <rees4@...>
>> Cc: "Evinrude & Johnson Boats of the 1960's and 70's"
>> <omc-boats@...
>> >
>> Sent: Friday, June 19, 2009 6:14 PM
>> Subject: Re: [OMC-Boats] carb question....
>>
>>
>>> perfect - thanks! i'm printing this out and taking it with me out
>>> there.
>>>
>>>
>>> On Jun 19, 2009, at 1:30 PM, <rees4@...> wrote:
>>>
>>>> those are your idle mixture screws. i'm assuming you have a 1970 2
>>>> bbl carb. if so screw each one in gently until they stop on the
>>>> needle seat. back them both out 1 1/2 turns. this should get you
>>>> close. run until your boat is fully warmed up then one screw at a
>>>> time turn the screw to the right slowly till the engine just starts
>>>> to hesitate and stall. next turn it to the left until the fuel
>>>> mixture is rich and the engine starts to lope or run rough. then turn
>>>> the screw to the right until engine runs smooth.all this is done at
>>>> idle. hope this helps. if someone knows more i won't be offended if
>>>> you chime in.
>>>> ed
>>>> ---- jd <jdood@...> wrote:
>>>>> so no one knows and/or wants to take a crack at what the two
>>>>> adjusting
>>>>> screws under the carb actually do? would love to know......so i
>>>>> don't make things worse by guessing my way through.
>>>>>
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Received on Monday, 22 June 2009