You need to get a SELOC manual for your year boat and it will give you the
numbers you need. You can GOOGLE cylinder compression and get a lot of info
on auto cylinder compression facts. I would test each cylinder and write
them all down and look for any numbers that seem to be way off or too low.
All cylinders will not be bad unless the motor is worn out. Mine ran about
100 to 120 but it has been 2 years since I checked so I could be off.. I
doubt the engine is worn out as we do not use the boats much but you never
know. You have plenty of time till the next season. There are tricks and
pitfalls with the process so be careful. TK
----- Original Message -----
From: "omc-boats-digest" <owner-omc-boats-digest@...>
To: <omc-boats-digest@...>
Sent: Saturday, December 10, 2005 12:00 PM
Subject: omc-boats-digest V1 #427
>
> omc-boats-digest Saturday, December 10 2005 Volume 01 : Number
> 427
>
>
>
> Re: [omc-boats] new member
> Re: [omc-boats] new member
>
> ----------------------------------------------------------------------
>
> Date: Fri, 9 Dec 2005 23:47:27 -0500
> From: "Ryan" <kmoore12@...>
> Subject: Re: [omc-boats] new member
>
> This is a multi-part message in MIME format.
>
> - ------=_NextPart_000_000F_01C5FD1A.E94C5CC0
> Content-Type: text/plain;
> charset="iso-8859-1"
> Content-Transfer-Encoding: quoted-printable
>
> Ok..I got a compression gage. The guy who loaned it to me said I should =
> check not only the compression but also the tolerance between =
> cylinders??? I assume that means make sure one cylinder isn't way more =
> or less the than others. Any idea what the tolerance is + or - ? Is =
> this necessary?
> Ryan
> ----- Original Message -----=20
> From: David=20
> To: omc-boats@...=20
> Sent: Monday, December 05, 2005 5:47 PM
> Subject: Re: [omc-boats] new member
>
>
> Ryan, The first thing I would suggest you do is a compression test on =
> the engine - often overheating as bad as you described can cause the =
> head to crack - between the intake and exhaust valves - the area between =
> the two valves is only about 1/8th of an inch and often the crack is =
> hard to find. but if compression hits above 140 psi, and none lower, you =
> should be ok - heads by the way, in the mid-west, are very hard to find. =
> Dave
>
> Ryan wrote:
>
> The boat originally come from Florida. My Dad, brother in law, and I =
> found it in Indiana, where I'm from, for $500, trailer and all! Good =
> deal I thought. I moved to Wilmington, NC a couple of years ago and =
> just went and got it over Thanksgiving. I am surrounded by water here =
> and my brother in law was tired of getting stranded out on the lake. :) =
> The last few times it was out it overheated and stalled the motor. I =
> know I got my work cut out for me but I enjoy stuff like this. Also it =
> is cheaper than buying a new boat. I fired it up the other day and it =
> sounds good.
> The river has a little salt in it from the tide coming in and out =
> and of coarse the Intercostals waterway is salt water. Will this engine =
> last long if flushed and washed down after every use?=20
> I looked up the model number and did find out it is a 69'. I'll =
> pick up the book for it and go from there. I did notice the steering =
> wheel is cracking on both sides. Is it impossible to find original =
> parts for this boat? =20
>
> Thanks=20
>
> ----- Original Message -----=20
> From: lib1@...=20
> To: omc-boats@...=20
> Sent: Monday, December 05, 2005 9:26 AM
> Subject: Re: [omc-boats] new member
>
>
> Welcome aboard, Ryan. You'll find a lot of helpful people eager to =
> help you and share info. Sounds like from your description you have a =
> 1969 Sportsman. They feature a slightly deeper center hull, which =
> allowed them to run drier and a couple miles per hour faster.
>
> Blower/Bilge pump can be removed and torn down and the electric =
> motor can be refurbed. Or you could choose to replace it with modern =
> units, but you'll need a new seperate pump and new blower. You could use =
> the old switch to run the blower and setup the bilge to run =
> automatically, when it detects water.
>
> Get yourself a Seloc shop manual that covers the OMC 64-77 =
> "Electric-Shift" stringer-mounted drives. If the boat sat unused for a =
> number of years (or was started dry) the rubber impellor in the lower =
> unit water pump is probably in need of replacement.
>
> Where are you and your boat geographically located?
>
> Lee Shuster
> Salt Lake City
> ----- Original Message -----=20
> From: Ryan=20
> To: omc-boats@...=20
> Sent: Sunday, December 04, 2005 8:51 PM
> Subject: [omc-boats] new member
>
>
> Hello everyone. My name is Ryan and I found this list while =
> searching the Internet for information about a Sportsman 155 I recently =
> bought. I'm not even sure what year it is. I will post a picture of it =
> later. It's in pretty good condition except for a few things. The =
> Blower/Bilge pump is froze up and the prop tilt sticks occasionally. =
> The red and blue stripe down the sides is faded which I'm working on =
> buffing out. The last time we had it out it overheated. I'm thinking =
> it is the stern drive water pump. I have no idea what I'm doing so I =
> need to locate a book but I'm mostly interested in finding parts. Any =
> help will be greatly appreciated.
> - ------=_NextPart_000_000F_01C5FD1A.E94C5CC0
> Content-Type: text/html;
> charset="iso-8859-1"
> Content-Transfer-Encoding: quoted-printable
>
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
> <HTML><HEAD><TITLE></TITLE>
> <META http-equiv=3DContent-Type =
> content=3Dtext/html;charset=3DISO-8859-1>
> <META content=3D"MSHTML 6.00.2900.2769" name=3DGENERATOR></HEAD>
> <BODY text=3D#000000 bgColor=3D#ffffff>
> <DIV><FONT face=3DArial size=3D2>Ok..I got a compression gage. The =
> guy who=20
> loaned it to me said I should check not only the compression but also =
> the=20
> tolerance between cylinders??? I assume that means make sure one =
> cylinder=20
> isn't way more or less the than others. Any idea what the =
> tolerance is=20
> + or - ? Is this necessary?</FONT></DIV>
> <DIV><FONT face=3DArial size=3D2>Ryan</FONT></DIV>
> <BLOCKQUOTE dir=3Dltr=20
> style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
> BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
> <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
> <DIV=20
> style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
> black"><B>From:</B>=20
> <A title=3Dodin@... href=3D"mailto:odin@...">David</A> =
> </DIV>
> <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
> title=3Domc-boats@...=20
> href=3D"mailto:omc-boats@...">omc-boats@...</A> =
> </DIV>
> <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, December 05, 2005 =
> 5:47=20
> PM</DIV>
> <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [omc-boats] new =
> member</DIV>
> <DIV><BR></DIV>Ryan, The first thing I would suggest you do is a =
> compression=20
> test on the engine - often overheating as bad as you described can =
> cause the=20
> head to crack - between the intake and exhaust valves - the area =
> between the=20
> two valves is only about 1/8th of an inch and often the crack is hard =
> to find.=20
> but if compression hits above 140 psi, and none lower, you should be =
> ok -=20
> heads by the way, in the mid-west, are very hard to find. =20
> Dave<BR><BR>Ryan wrote:<BR>
> <BLOCKQUOTE cite=3Dmid003f01c5f9da$6695d790$9b34b841@... =
> type=3D"cite">
> <META content=3D"MSHTML 6.00.2900.2769" name=3DGENERATOR>
> <STYLE></STYLE>
>
> <DIV><FONT face=3DArial size=3D2>The boat originally come from=20
> Florida. My Dad, brother in law, and I found it in =
> Indiana,=20
> where I'm from, for $500, trailer and all! Good deal I=20
> thought. I moved to Wilmington, NC a couple of years ago and =
> just went=20
> and got it over Thanksgiving. I am surrounded by water here =
> and my=20
> brother in law was tired of getting stranded out on the lake. =
> :) =20
> The last few times it was out it overheated and stalled the =
> motor. I=20
> know I got my work cut out for me but I enjoy stuff like this. =
> Also it=20
> is cheaper than buying a new boat. I fired it up =
> the other=20
> day and it sounds good.</FONT></DIV>
> <DIV><FONT face=3DArial size=3D2>The river has a little salt in it =
> from the tide=20
> coming in and out and of coarse the Intercostals waterway is salt=20
> water. Will this engine last long if flushed and washed down =
> after=20
> every use? </FONT></DIV>
> <DIV><FONT face=3DArial size=3D2>I looked up the model number and =
> did find out=20
> it is a 69'. I'll pick up the book for it and go from =
> there. I=20
> did notice the steering wheel is cracking on both sides. Is it =
>
> impossible to find original parts for this =
> boat? </FONT></DIV>
> <DIV> </DIV>
> <DIV><FONT face=3DArial size=3D2>Thanks </FONT></DIV>
> <DIV> </DIV>
> <BLOCKQUOTE dir=3Dltr=20
> style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
> BORDER-LEFT: rgb(0,0,0) 2px solid; MARGIN-RIGHT: 0px">
> <DIV=20
> style=3D"FONT: 10pt arial; font-size-adjust: none; font-stretch: =
> normal">-----=20
> Original Message ----- </DIV>
> <DIV=20
> style=3D"BACKGROUND: rgb(228,228,228) 0% 50%; FONT: 10pt arial; =
> font-size-adjust: none; font-stretch: normal; moz-background-clip: =
> initial; moz-background-origin: initial; moz-background-inline-policy: =
> initial"><B>From:</B>=20
> <A title=3Dlib1@...=20
> href=3D"mailto:lib1@...">lib1@...</A> </DIV>
> <DIV=20
> style=3D"FONT: 10pt arial; font-size-adjust: none; font-stretch: =
> normal"><B>To:</B>=20
> <A title=3Domc-boats@...=20
> href=3D"mailto:omc-boats@...">omc-boats@...</A> =
> </DIV>
> <DIV=20
> style=3D"FONT: 10pt arial; font-size-adjust: none; font-stretch: =
> normal"><B>Sent:</B>=20
> Monday, December 05, 2005 9:26 AM</DIV>
> <DIV=20
> style=3D"FONT: 10pt arial; font-size-adjust: none; font-stretch: =
> normal"><B>Subject:</B>=20
> Re: [omc-boats] new member</DIV>
> <DIV><BR></DIV>
> <DIV><FONT face=3DArial size=3D2>Welcome aboard, Ryan. You'll find =
> a lot of=20
> helpful people eager to help you and share info. Sounds like from =
> your=20
> description you have a 1969 Sportsman. They feature a slightly =
> deeper=20
> center hull, which allowed them to run drier and a couple miles =
> per hour=20
> faster.</FONT></DIV>
> <DIV> </DIV>
> <DIV><FONT face=3DArial size=3D2>Blower/Bilge pump can be removed =
> and torn=20
> down and the electric motor can be refurbed. Or you could choose =
> to=20
> replace it with modern units, but you'll need a new seperate pump =
> and new=20
> blower. You could use the old switch to run the blower and setup =
> the bilge=20
> to run automatically, when it detects water.</FONT></DIV>
> <DIV> </DIV>
> <DIV><FONT face=3DArial size=3D2>Get yourself a Seloc shop manual =
> that covers=20
> the OMC 64-77 "Electric-Shift" stringer-mounted drives. If =
> the boat=20
> sat unused for a number of years (or was started dry) the rubber =
> impellor=20
> in the lower unit water pump is probably in need of=20
> replacement.</FONT></DIV>
> <DIV> </DIV>
> <DIV><FONT face=3DArial size=3D2>Where are you and your boat =
> geographically=20
> located?</FONT></DIV>
> <DIV> </DIV>
> <DIV><FONT face=3DArial size=3D2>Lee Shuster</FONT></DIV>
> <DIV><FONT face=3DArial size=3D2>Salt Lake City</FONT></DIV>
> <BLOCKQUOTE dir=3Dltr=20
> style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
> BORDER-LEFT: rgb(0,0,0) 2px solid; MARGIN-RIGHT: 0px">
> <DIV=20
> style=3D"FONT: 10pt arial; font-size-adjust: none; font-stretch: =
> normal">-----=20
> Original Message ----- </DIV>
> <DIV=20
> style=3D"BACKGROUND: rgb(228,228,228) 0% 50%; FONT: 10pt arial; =
> font-size-adjust: none; font-stretch: normal; moz-background-clip: =
> initial; moz-background-origin: initial; moz-background-inline-policy: =
> initial"><B>From:</B>=20
> <A title=3Dkmoore12@... =
> href=3D"mailto:kmoore12@...">Ryan</A>=20
> </DIV>
> <DIV=20
> style=3D"FONT: 10pt arial; font-size-adjust: none; font-stretch: =
> normal"><B>To:</B>=20
> <A title=3Domc-boats@...=20
> =
> href=3D"mailto:omc-boats@...">omc-boats@...</A> </DIV>
> <DIV=20
> style=3D"FONT: 10pt arial; font-size-adjust: none; font-stretch: =
> normal"><B>Sent:</B>=20
> Sunday, December 04, 2005 8:51 PM</DIV>
> <DIV=20
> style=3D"FONT: 10pt arial; font-size-adjust: none; font-stretch: =
> normal"><B>Subject:</B>=20
> [omc-boats] new member</DIV>
> <DIV><BR></DIV>
> <DIV><FONT face=3DArial size=3D2>Hello everyone. My name is =
> Ryan and I=20
> found this list while searching the Internet for information =
> about a=20
> Sportsman 155 I recently bought. I'm not even sure what =
> year it=20
> is. I will post a picture of it later. It's in =
> pretty good=20
> condition except for a few things. The Blower/Bilge pump =
> is froze=20
> up and the prop tilt sticks occasionally. The red and blue =
> stripe=20
> down the sides is faded which I'm working on buffing out. =
> The last=20
> time we had it out it overheated. I'm thinking it is the =
> stern=20
> drive water pump. I have no idea what I'm doing so I need =
> to=20
> locate a book but I'm mostly interested in finding parts. =
> Any help=20
> will be greatly appreciated. =20
> =
> </FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY><=
> /HTML>
>
> - ------=_NextPart_000_000F_01C5FD1A.E94C5CC0--
>
> - -----
> To get off this list send mail to omc-boats-unsubscribe@...
>
> ------------------------------
>
> Date: Fri, 9 Dec 2005 23:08:15 -0600 (CST)
> From: Ethan Brodsky <brodskye@...>
> Subject: Re: [omc-boats] new member
>
> On Fri, 9 Dec 2005, Ryan wrote:
>> Ok..I got a compression gage. The guy who loaned it to me said I should
>> check not only the compression but also the tolerance between
>> cylinders??? I assume that means make sure one cylinder isn't way more
>> or less the than others. Any idea what the tolerance is + or - ? Is
>> this necessary?
>
> I recently picked up the factory service manual for the 1970 155 HP OMC
> V-6. It specifies the following procedure for compression testing:
>
> (a) Remove all spark plugs
> (b) Put throttle and choke in wide open position
> (c) Remove wire from coil to distributor cap and ground securely to engine
> (d) Attach remote starter switch to starter assist solenoid
> (e) Insert compression gauge in spark plug port. Crank engine through
> at least 4 compression strokes to obtain the highest possible reading.
> (f) Check compression of each chlinder. Repeat a second time and record
> the highest reading for each cylinder
> (g) The recorded compression pressures are to be considered normal if the
> lowest cylinder pressure reading is more than 75% of the highest
> (h) Example: 129,135,140,121,120,100 - 75% of 140 is 105. Thus, cylinder
> 6
> is less than 75% of number 3. This condition, accompanied by low speed
> missing, indicates an improperly seated valve or worn or broken piston
> ring.
> (i) If one or more cylinders reads low, inject about a tablespoon of
> engine
> oil on top of the piston in low reading cylinder through the spark plug
> port. Repeat compression check on these cylinders
> (1) If compression improves considerably, rings are worn
> (2) If compression does not improve, valves are sticking or seating
> poorly
> (3) If two adjacent cylinders indicate low compression and injecting
> oil does not increase compression, the cause may be a head gasket
> leak between the two cylinders. Engine coolant and/or oil in
> cylinders could result from this defect.
>
> Also, for Mark (the guy with the boat that won't go), the shift coil
> resistance should be between 4.5 and 6.5 ohms, not the 2.xx ohms I
> quoted earlier. The current draw is specified as 2.2 +- 0.2 A.
>
> Ethan
> - -----
> To get off this list send mail to omc-boats-unsubscribe@...
>
> ------------------------------
>
> End of omc-boats-digest V1 #427
> *******************************
>
> -----
> To get off this list send mail to
> omc-boats-digest-unsubscribe@...
>
-----
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Received on Saturday, 10 December 2005
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