Re: [omc-boats] (no subject)

No, No, a cracked head can be replaced - the last one I did took me 1.5
hours and I was Lolly Gagging while doing it. If you are mechanical
it's no big deal - these engines are easy to work on. If you hire it
done it will cost, but the biggest problem you may have is finding a
used head - very few old Buick or Jeep V6's around any more - and not
all those engines have the exact same head - you need to go by the
numbers on the head. thats why aside from my 6 OMC boats I have three
V6 blocks, One complete V6, two complete 120 hp inline 4 cylinder
engines, three extra stern drives, lots of motormounts and intermediate
housings - guy never knows when he might need something! - but first,
check out the compression when the engine is hot - that may not be a
problem - I had a boat once that I picked up with no power - couldn't
even get on plane - found out it was just the dwell setting on the
points - once adjusted and the timing set, it jumped out of the water -
so don't worry about it until you know - whatever it is, I am sure the
group will be able to help! Dave

jdood wrote:

>
>
> Jeff, my advise to you is to ask any mechanic you propose to use if
> there is a water stream out of the sterndrive - if they say no - run
> away from them as fast and as far as you can!
>
>
>
> Yeah, agreed. But this guy seems legit, has a big shop, boats only,
> OMC certified, etc.
>
>
>
> Second, always feel the exhaust manifolds - if water is circulating
> they will be warm, not hot - and you are ok - if hot, you are not ok.
>
>
>
> That is one I will definitely try…..
>
>
>
> As to the power loss - the first thing to check is the compression -
> if any cylinder is low, say less than 120 psi, you could well have a
> cracked head - the most common crack is between the intake and exhaust
> valves which are very close together and the crack is usually very
> thin and hard to see - usually with this type of crack the engine will
> run fine when cold and then lose power as soon as it heats up - so it
> is best to check compression when it is hot. Dave
>
>
>
> And if it’s a cracked head, that spells new engine, right? Not
> fixable, right? (gulp).
>
>
>
> jdood wrote:
>
> Ideal timing for this topic. I am dealing with my hot light coming on
> frequently. I have a 155hp Deluxe. I am on my 2nd mechanic now,
> problem still not solved. Going for a water test tomorrow with him.
> Just paid a bundle to have a new impeller and impeller housing
> replaced, and it definitely needed to be done. I just didn’t want to
> attempt it myself – not still during the season atleast. So now I
> have a nice new impeller, and supposedly a new engine water pump too
> (according to the 1st mechanic). So in theory, water should be
> flowing through the engine just fine. But the hot light still is
> coming on, and worse, I have barely any HP at full throttle. It tops
> out at about 10 mph. Not good, I know. For some stupid reason, the
> temp light was wired by some previous owner so It only comes on when
> the instrument lights are turned on. And of course I only discovered
> that after several times out. Most of those times it ran great, just
> wouldn’t start back up when hot. But the past 3 times it has had
> this throttle problem. I am just hoping nothing has been serious
> damaged. Anyway – will hopefully know more tomorrow after the water
> test. But my main question is this:
>
>
>
> I have always had outboards, all of which had a nice easy to see tell
> tale stream of water shooting out the side when things were working
> right. I asked 2 boat mechanics on separate occasions if stern drives
> were supposed to have the same thing, both said no – that outboards
> do, but i/o’s don’t. But this post says otherwise. So do they or
> don’t they? And if not, why not? How are you supposed to tell if
> water is circulating properly?
>
>
>
> jeff
>
>
>
> -----Original Message-----
> From: owner-omc-boats@...
> <mailto:owner-omc-boats@...>
> [mailto:owner-omc-boats@...] On Behalf Of David
> Sent: Wednesday, September 13, 2006 1:20 PM
> To: omc-boats@... <mailto:omc-boats@...>
> Subject: Re: [omc-boats] (no subject)
>
>
>
> Curt,
> If the temp light is on the first thing to check is the stern drive
> while it is running - on the starboard side of the drive you should
> see a steady stream of water shooting out - if not shut her down -
> that would mean the impeller is not pumping at all. Next, if water is
> coming out open the engine cover and feel the exhaust manifolds - they
> should be cool enough to hold your hand on - if not and they feel
> really hot when the light is on, then shut her down - it would likely
> be the engine water pump, or the thermostat that needs attention. As
> to wintering, and I know people will flip at this, but I have seven
> OMC's and have had them for years and have always just opened the
> petcocks on each side of the block - never bothered taking off the
> water pump hoses etc. - just make sure the boat is realatively level
> and the block will drain down and you will not have any freezing
> problems. I keep an OMC V6 Sportsman on the davits on the back of my
> houseboat - and I have used it at 10 below zero - when I lift it back
> out of the water all I do is open those two petcocks - the only real
> problem I have is remembering to close them when I go for a ride - of
> course eventually warm water will creep up to my feet - a sure, but
> gentle reminder! Dave
>
> Curt Broek wrote:
>
>Group,
>
>I am a relatively new owner. I have a Sportsman 155 acquired in a cabin
>
>purchase. Its in terrific condition. I'll post pics on the other site
>
>sometime soon.. I have a relatively basic question. The temp light goes on
>
>after a few minutes in the water. Do I need to replace the water pump and
>
>if so, do I need to know anything special to accomplish that. Where do I
>
>get parts? Also, I need to winterize it soon. Could anyone give me some
>
>pointers there too?
>
>Much appreciated,
>
>Curt
>
>
>
>
>
>On 9/13/06 2:35 PM, "Curt Broek" <cabroek@...> <mailto:cabroek@...> wrote:
>
>
>
>
>
>>David,
>>
>>Here are my vitals:
>>
>>
>>
>>Curt Broek
>>
>>3941 Greenview Dr.
>>
>>Urbandale, IA
>>
>>cabroek@... <mailto:cabroek@...>
>>
>>'68 Sportsman 155
>>
>>(in Hackensack, MN)
>>
>>
>>
>>I have had trouble getting emails to be sent when I reply. Let me know if
>>
>>you get this.
>>
>>Curt
>>
>>
>>
>>
>>
>>On 9/13/06 9:10 AM, "David" <odin@...> <mailto:odin@...> wrote:
>>
>>
>>
>>
>>
>>>Ok, as all the members on the membership listing know, I have sent out
>>>
>>>an updated listing - but only to the listed members - if anyone out
>>>
>>>there has not gotten a listing, and should have, let me know - Also, if
>>>
>>>anyone out there has not sent me all the info to get on the list, I am
>>>
>>>ready to add anyone at anytime - just let me know the following:
>>>
>>>
>>>
>>>Name:
>>>
>>>Address:
>>>
>>>Telephone #:
>>>
>>>Email Address:
>>>
>>>OMC Boats owned:
>>>
>>>
>>>
>>>And I'll get you on the list and get a copy of the list back to you. Dave
>>>
>>>-----
>>>
>>>To get off this list send mail to omc-boats-unsubscribe@... <mailto:omc-boats-unsubscribe@...>
>>>
>>>
>>>
>>
>>
>>-----
>>
>>To get off this list send mail to omc-boats-unsubscribe@... <mailto:omc-boats-unsubscribe@...>
>>
>>
>>
>
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Received on Thursday, 14 September 2006