1988 30' Sea Ray Weekender

E

estame6

Member
Jul 12, 2007
31
Port Huron
Boat Info
1993 310 SunSport
Engines
twin 454, bravos
Hi all. I am looking for a wiring diagram for my Sea Ray and I seem to be search all the wrong areas. I followed the sticky and it mentions "Service Tab" and cant seem to find it. I followed a customer service and seem to be filling out my name and address etc and are prob going to mail it. Does anyone have any suggestions, many thanks.
 
About all the help your going to get will be the owners manual. All it will tell you is what color wiring the different systems used. Not how they are routed, connections, etc.. I have looked and looked for my 89 and I keep getting "Good Luck". What problems are you having? I know my co-worker has the same boat and whenever we talk it seems like most of the wiring is the same. Routing is different to a degree I'm sure.
 
Your correct, good wiring info seems to be tough to get. I need to trace out my stbd gas gauge. I have been working on my stbd engine water pump and may have stood on something to effect my stbd gas gauge to not work. Would be so nice to have some kind of simple wiring diagram. Would appreciate any help, many thanks...
 
This is about the best thing you are going to find. Fuel gauge is a very simple system. I just had to replace my sender, which is more often the problem. If you think there is an open, remove the wire from the sender and touch to ground and then open with the key on. This should tell you if the signal wire is good.




The Teleflex fuel gauge and the level sender are designed to operate on 240 ohms (empty) and 33 ohms (full). Most other manufacturers build a marine fuel level system of the same resistance as gauges and senders may be mixed at the boat builder level.
There are only three components to the system-gauge, level sender, and the connecting sender wire. The sender wire should be inspected for breaks in the copper or corroded connection to the terminals.
The fuel gauge can be inspected in the following manner. Turn the ignition on. Remove the sender wire from back of gauge. Pointer must go below the empty mark. Next, connect the gauge sender terminal to ground. The pointer must go above the full mark. If the pointer moves past both E and F, the gauge is functional.
To check the fuel level sender remove wires from sender terminal. Connect volt/ohmmeter to two sender terminals (digital ohmmeter will tend to be jumpy). Ohmmeter should read approximately:

  1. 240 ohms @ empty
  2. 100 ohms @ 1/2 and
  3. 33 ohms @ full.
If the sender is not sized properly for the tank, errors in gauge reading can also occur.





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Well good luck!

I have not been able to find a hull wiring diagram. However, I did get diagrams for the engines when I ordered my manuals from Merc.

I'm an old aircraft mechanic and when I pulled the access panel in the head to get to the back of the cabin instrument panel, needless to say I was not very impressed.:smt009
 
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Looks alot like the area behind my dash. Not to mention the wires the PO added for the GPS and other assorted items. I have found that it's a game of hide and seek. They hide it, you seek for it. The owners manual is sometimes useless. It will tell you something, and you will find something completley different.
 
wileecoyote said:
The owners manual is sometimes useless. It will tell you something, and you will find something completley different.
Click to expand...


LOL Amen to that!

I found the original windlass cables going to the front. When I traced them, I found them cut, not taped and still hooked to the battery!!! There is a grey wire to I have to find out what is up with that.:wow:

This has certainly been an adventure so far.
 
Mine is the stbd fuel gauge just suddenly read zero with full (or close) tank. I have been working on the stbd side of the engine and thought I may have trodden on something causing a disconnection or a terminal or something. I am not quite sure on the color or were the wire is routed. I am just trying to get some info before I start taking everything apart. Thanks...
 
estame6 said:
Mine is the stbd fuel gauge just suddenly read zero with full (or close) tank. I have been working on the stbd side of the engine and thought I may have trodden on something causing a disconnection or a terminal or something. I am not quite sure on the color or were the wire is routed. I am just trying to get some info before I start taking everything apart. Thanks...
Click to expand...

Did you not read the big post & diagram I posted? This is one of the easiest circuits to diagnose and fix. The PINK wire is the sender wire to the gauge. The gauge has a RED wire giving it Ignition supplied 12V. Reread my earlier post, and when you have checked it as described report your findings.
 
I am here to report my findings. A very cramped situation posed over the starboard engine trying not to destroy anything, having to remove the 4" blower hoses which doesn't want to be moved and ended up having to cut it. About an hour or so finally saw the sending unit and the pink wire. With about 2 1/2" of tank top to work in found the sender was at the extreme starboard side and totally unable to reach, and my arm would not fit.

Who ever designed this (or not) intended for the engine and tank to be removed to change the sending unit. If this is the case then I am confused to see how the filler and overflow hoses are to be removed due to being on the backside of the tank.

Further questions asked of owners of 9x 30' Sea Rays in my club all of the same Weekender era 4, mine being now the 5th have a gas gauge inoperative and will probably go down with them that way.

Doesn't say much for Sea Ray.
 
Guess thats alot different then mine. My tanks ride just outbard of the engines on the "shelf" outboard of the exhaust manifolds. My senders are just under the edge of the deck. If you remove the engine hatch there is very easy access. I'll have to ask the guy I work with that has a 88 300 and see if he has replaced his and if there are any tricks that may help you. Sorry to hear about the placement.
 
Thanks Wilee, They were prob trying to get the weight more forward. If you can check with you pal see if he has anything to add.

Mike, An acronym, W-D? Also I really like the older 300's and their extra 2 ton. The newer were such an over all style change, they are times where I would change, specially now - LOL. Where are your tanks located, accessible?
 
Thanks for the diagram, good info. I hadn't thought about checking the tank grounding.
Did you get my pm about upholsterer? Dave.
 
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