Inboard running cold
 

Good afternoon gents, i have a 23 straight inboard and after all the problems i had with her overheating at the biggining of the season, now the temp hardly rises at all. It has been doing this since i fixed the overheating issue. What would be the likely cause of the this? i checked the thermostat druing the overheating problem and it worked fine. Also, what could happen if i continue to run with a cool engine. thanks for any help.

Elijah
(Osprey)

Re: Inboard running cold
 

Sounds like it may be the sender if everything else is going fine. Feel the manifolds for heat. If they are warm your engine is coming up. You can get (borrow) a mechanic's thermometer to test the temp. Is the gauge coming up at all? I would trouble shoot sender, wires to gauge and gauge itself and then go backand test your t-stat again.

Re: Inboard running cold
 

At least its running good,Sounds like its the sender.Disconect the wire and see what the guage, then ground the wire and see what the guage does,it should swing from one side to the other,if it does not swing and you know the wire is good the guage is no good,if it does swing the sender is no good, good luck. Also I was out at crab ledge an got lucky,Sunday 13,no birds,whale,but got a :cool: 51" tuna app.75lbs and a short one.Photo soon.going to try the bay next.

Re: Inboard running cold
 

Hey Elijah, good to know she is running good!!! Better too cold than too hot!!!!! The only down side of running too cold is a little bit more gas burn (from what Im told anyway). Sounds to me like the sender is suspect also- if you recently changed it make sure it is in a water jacket on the intake instead of a air/gas jacket. That will make it do the same thing also (been there,done that). Let us know - my boat is slowly going back together now- as soon as my new fuel tanks arrive I should start making solid progress- see ya- craig :)

Re: Inboard running cold
 

Now, by sender what exactly do you guys mean? the gauge moves slightly if a go WOT. Other than that i notice no movement. It shouldn't be too price to just replace everything and be done with it right? Rod man, congrats on the tuna, i haven't been out in the bay for a while, trying to save some money for the fall/winter cod run. I heard this past week, was the best it has been in a while on the SW corner of stellwagon. Miles, lets see some more porn! How much were the new tanks, i will be replacing mine next year. Looking forward to the pictures. Good luck and any more idea about the temp thing would be great. Thanks guys.

Re: Inboard running cold
 

The sender is the temp sensor on the engine,you stated at wot the temp moves,sound like the thermostat is opening to early poss.stuck open a little allowing the engine to run cool.When you had the overheating did you change the thermostat? If not I would do it now.Heard the same on the tuna.

Re: Inboard running cold
 

I agree, it's either a bad or incorrect thermostat, the sender, the gauge or a bad ground or wiring.

Re: Inboard running cold
 

If the coolant level is very low it will do the same. The sending unit only works accurately if submerged in liquid, not air.

Re: Inboard running cold
 

Just to be sure, when i removed the thermostat at the biginning of the season to test it i was pretty sure i put it back in the same way as i took it out. This thermostat is shaped kinda like a pyrimid. Which way should the point of the pyrimid be facing, up or down. I can't remember now which way i put it back in but i will check when i found out which was is correct. Thanks guys i will check this stuff out and let you know when i can.

Re: Inboard running cold
 

Sounds like you put it in the right way because if you installed it backward it would be overheating. :)

Re: Inboard running cold
 

hey Elijah- i have more porn coming soon dude!!!

Re: Inboard running cold
 

Chance look real carefully at the connection of the wires at the sender on the engine, if they are dirty then it throws the whole reading off due to the extra resistance, clean them real good and see if it helps. Best way to tell what its really doing is shoot the thermostat cover(and other stuff like manifolds) with a infared temp tester after(and while) you run it, we have one at work and it is the best way to find out how hot different parts of the engine are running. If I remember right I saw you this spring down at Barn Hill? Sharp boat I like the dog house, I thought I had seen your boat somewhere before. Rod Man last week someone pulled a 1180 lber out of the bay :cool: Less smaller fish than normal but the fish that are there are bigger than recent years. Lots of balloons out this week when it was like glass.

Re: Inboard running cold
 

Chance,
The theromstat should be installed crown (pyramid) up with the flat button side down. If the motor is actually running cold (bellow 180) you're going to GREATLY acelarate the wear on your motor. Cylinder walls will wear from poor lubrication and increased piston/wall clearance. Bearings and journals will also be the worse for wear because the oil will not be functioning optimally. With in reason it's actually better to run too hot that too cold. A motor that spends a few years at 220 will be in better shape than one at 170.

Any ways...
Are you still mored in plymouth? I've got a 23'hydrosport skiff in the harbor. If possible, I'd like to check out your boat. I'm going through a 23 inboard with my buddy kmodi in my shop in carver and would love to pick your brain. Great looking boat, good luck.

Re: Inboard running cold
 

Well i checked her out today, and my first step was the thermostat. I ran the engine for about 20 minutes before. then waited 5-10 minutes and removed the thermostat, and it was open. Which i believe means it was stuck open. I didn't have a new one so i tried to clean it and put it back in. Then started it and the gauge started to move after about 3 minutes. My gauge does not have numbers on it just marks, and it got to the first mark just above the "C" and stayed there for the next 20 minutes at idle. Is it even worth it to try to clean a thermostat or should i just get a new on. Wires and connections all looked good and tight. Hopefully i fixed it or will just need to get a new stat. Thanks for all the help again guys.

Re: Inboard running cold
 

If ya think its stuck, throw it out. You dont want to risk it getting stuck closed. On a side note Chance what type of lay up did you use on your dog house? I'm starting one this fall and don't want to over/under do it on the glass. Trying to keep it light but strong, gonna use divynicell(closed cell foam) instead of plywood. :D

Re: Inboard running cold
 

Thanks, Divynicell will make it very light. I was going to go that route but due to $$, i opted for 1/2 inch marine grade plywood. First thing to do is get the right height, mine is a little tall for me, about 6foot 4 to top of inside. Then radius the edges for easy glass layup. I can't recall what weight glass i went with. After it was all framed out i cut 4 and 8 inch wide strips for all my corners. I layed the 4 inch on first then the 8 and then just one layer of glass on everything else. It was pretty flimsy before the glass and solid as a rock after. then i just finished the whole thing with 2 coats of gell coat. If i ever do it again i will go with divnycell. Also the windows i got custom made from Wynne, they have a good site that tells you everything you need about how to make the templates and the measurements required. Hope this helps. You can look under the photos part of this site under "MY FIRST" and there are some pics of the doghouse through various stages.

Re: Inboard running cold
 

:DDid you get the engine up to temp.Chance???????

Re: Inboard running cold
 

Yup she seems to be okay now, i bought 2 stats and will keep them on board. I left the original one in there after i cleaned it up. I will replace it before i go out for another extended trip. Thanks again guys

Re: Inboard running cold
 

What does it run at? We had Kmodi's boat out this weeekend and it ran at 160. I guess that's the operating temp for a right hand motor? Either way, its a beautiful boat that goes like hell and is a joy to fly fish out of. We took a few laps around your machine. Sharp boat!

Re: Inboard running cold
 

I don't know the temp, there are no numbers on the gauge, just marks. But the thermostat is set at 140. Sorry i couldn't swing by to see your boat, work has kept me pretty busy lately, haven't gone out fishing in about a month. Hopefully that will change soon.