Re: [omc-boats] Tuning engine out of the water?

RE: Water adapters: Tempo Products used to make a spring loaded adapter
that allowed a graden hose to supply water to the sterndrive water pickup,
just aft of the prop. These are virtually unobtainable, unless you lucked
into somebody's NOS. OMC also made a bolt on hose adapter, that replaces one
of the end-caps. These are more plentiful than the Tempo-style but still
fairly expensive (used or new).

I like the radiator flush idea, but have never tried it. Seems like a
sensible, affordable approach.

Of all the precautions listed, the most important one is never start the
engine dry. Even for 10 seconds. The 1200 -1500 max RPM while on "artifical"
water is OK, but some times you're going to blip the throttle to check
various enginme functions. The over-heating of "out-of-water" shift coils is
overly cautious. They just don't get very hot. Unlike your coil ballast
resistor if you leave the key on very long without the engine running.

----- Original Message -----
From: "Ethan Brodsky" <brodskye@...>
To: <omc-boats@...>
Sent: Monday, June 26, 2006 9:46 AM
Subject: Re: [omc-boats] Tuning engine out of the water?

> On Sun, 25 Jun 2006, Tom Kennedy wrote:
>> OK I've got another question...when I bought my boat (68 Sportsman 155),
>> it had been sitting for a number of years outside without being prepared
>> for storage. To make a long story short, I'm rebuilding the carb among
>> a bunch of other things. I don't have access to water where I can
>> tinker with the engine for an extended period (public access nearby is
>> all). SO is there any safe way I can run the engine/drive out of the
>> water while I tune/time it? There is no garden hose adapter (can this
>> be purchased and fitted?) and the universal earmuff-style garden hose
>> adapters don't work on these things.
>> What to other landlocked owners do when they need to run the engine for
>> repairs? Any advice is greatly appreciated!
>
> I've bought a plastic "radiator flush fill adaptor" for $3 from an auto
> parts store and installed it in one of the hoses running from the
> intermediate housing to an exhaust manifold. It's a "Y" that allows
> you to hook up a garden hose and pump water directly into the coolant
> system, into effectively the same spot as the OEM flush adaptors
> (mentioned
> by others).
>
> I'm always concerned about adjusting the flow correctly - too little
> and you might starve the pumps, no much and the pressure might blow out
> seals. I've never been sure how to do this properly, but I try to
> adjust the valve so that I have a little water back-flowing out
> the pickup during operation. Due to the restriction in the flush
> fill adaptor I have, this is almost wide-open on the garden hose,
> but an unrestricted adaptor would allow more flow. Or maybe this
> isn't something to worry at all - I don't know.
>
> The service manual also cautions against running the engine at high power
> on a flush adaptor (though without resistance, you can't dissipate much
> power anyway), and also against leaving it in gear for long periods of
> time
> (since the shift solenoids are water-cooled through immersion of the lower
> unit).
>
> Ethan
>
> --
> Ethan Brodsky
> UW FutureCar Team Paradigm: Two-Year FutureCar Challenge Winner
> UW-Madison Clean Snowmobile Team: Winner of the 2004 SAE CSC
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>
>

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Received on Monday, 26 June 2006