First Solo Trip! Update: COOLING problem? :-(

Restless22

Petty Officer 2nd Class
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Jun 6, 2012
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We wanted to clean up our beloved Aruba today, and had help from my sister in law, her teen daughter and friend, and my teen boy and almost teen girl.

Well, once we got there, and the water was so calm, I just had to go out. Now this is my first boat, and yesterday was my first training with the seller.

So, with a mix of courage and fear, I checked the oil and headed out of my slip. I did fine in the no wake areas and followed the buoy channel markers to get to the river. I did fine, and slowed to not wake the fishermen and waved to other sporting boats.

It sure was tough to get the speed everyone wanted, but I had 3 teens, 3 adults and 1 near teen on the boat. Even when trying to get on plane, by moving everyone into the cabin, I struggled to match the speed of just 3 on board from yesterday. I learned a lesson on weight management and engine capability today. So, I did have spurts of fun and speed, but once the temp went to 170-180 on the old 350 Merc, I backed it down and cruised.

I need some training on getting up to plane, but I think the weight had a lot to do with it.

We had a nice trip, but I decided to head back, remembering all of my marks, and made it back fine, although the grass is getting thick here, and the channel is narrowing. I got some nice waves from the big houseboat folks lounging in their slips, and a nice man asked how our trip was when we passed, and I told him it was my first. He told me congrats with a big smile on his face. I did ok getting back into my slip with the hydrolift, with my First Mate in Training, my 14 year old son. After my OCD method of trying to get it perfectly lined up and getting my battery charger connected and my waste pump out connector on, we aired the lift up, and I used my shore garden hose to wash off the hull.

So now, I'm enjoying a Miller Lite with a sense of accomplishment.

Sorry for the long post, but I had to share it with my friends here!
 

64osby

Admiral
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Re: First Solo Trip! Review and Seeking Advice

Re: First Solo Trip! Review and Seeking Advice

Sounds like a great day. Relax and don't sweat the little things. Enjoy.
 

JoLin

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Re: First Solo Trip! Review and Seeking Advice

Re: First Solo Trip! Review and Seeking Advice

So, I did have spurts of fun and speed, but once the temp went to 170-180 on the old 350 Merc, I backed it down and cruised.

Glad you had fun, but the engine temp shouldn't rise any higher than the T-Stat spec regardless of passenger load. You have an issue somewhere in the cooling system. Water pump, impeller, manifold, t-stat... something's restricting the water flow through the motor.

My .02
 

Restless22

Petty Officer 2nd Class
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Re: First Solo Trip! Review and Seeking Advice

Re: First Solo Trip! Review and Seeking Advice

The selller told me to keep it under 220 or a buzzer would sound on our demo trip. I was using 160-180 from my car background. I never let it get above 180, so I'm not sure here the TStat is set at.
 

JoLin

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Re: First Solo Trip! Review and Seeking Advice

Re: First Solo Trip! Review and Seeking Advice

The selller told me to keep it under 220 or a buzzer would sound on our demo trip. I was using 160-180 from my car background. I never let it get above 180, so I'm not sure here the TStat is set at.

Is this motor fresh water (has a heater exchanger like a radiator and uses anti-freeze) or raw water cooled? RWC marine engines use no higher than a 160 deg t-stat. If FWC, 180 might be normalk. The buzzer sounds because you're overheated. 220 is overheated. Period. Again, engine temp should never rise higher than the temp setting of the t-stat. Never. If it does, there's a problem.

My .02
 

Restless22

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Re: First Solo Trip! Review and Seeking Advice

Re: First Solo Trip! Review and Seeking Advice

The impeller and bellows were recently done. My heart is sinking!!!!

What am I up against here???
 

Restless22

Petty Officer 2nd Class
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Re: First Solo Trip! Update: COOLING problem? :-(

Is this motor fresh water (has a heater exchanger like a radiator and uses anti-freeze) or raw water cooled? RWC marine engines use no higher than a 160 deg t-stat. If the owner told you that, it means that the motor has a cooling issue. The buzzer sounds because you're overheated. 220 is overheated. Period. Again, engine temp should never rise higher than the temp setting of the t-stat. Never. If it does, there's a problem.

I really hate to rain on your parade, but that motor's killing itself.

My .02

It's raw water. Help!!!!
 

JoLin

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Re: First Solo Trip! Update: COOLING problem? :-(

Okay, I changed my last post a little. You're running higher than normal temps, but all is not lost. There'll be a reason. I'm most concerned that the owner knows the alarm will go off at 220. Does he know it from reading the manual, or because it happens?

If the impeller has been changed, you need to dig a little. Does the motor have the correct t-stat in it, and is it working correctly? Have engine manifolds and risers ever been changed? That's something that fresh water boaters tend to ignore, but they do have a finite lifespan.

I don't know what your configuratiuon is- inboard, I/O, Mercruiser, Volvo-Penta, OMC? Try posting in the appropriate engine forum.
 

Restless22

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Re: First Solo Trip! Update: COOLING problem? :-(

I posted in the Mercruiser I/O section. Mine is a 350 Magnum, carbed and cooled by raw water.
It is a stern drive with an Alpha 1 outdrive.
 

theteacher

Petty Officer 2nd Class
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Re: First Solo Trip! Update: COOLING problem? :-(

My Stingray has a 350 Merc, Bravo 1 and it stays at 170-180, at idle or at 60 mph, everywhere in between, it hardly changes.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
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Re: First Solo Trip! Update: COOLING problem? :-(

you have two threads on the same topic. thats a no no. hopefully a moderator comes along and merges the threads.
 

Restless22

Petty Officer 2nd Class
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Re: First Solo Trip! Update: COOLING problem? :-(

Sorry. I followed the advice to start one in the engines forum as suggested. Apologies.
 

Fireman431

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Re: First Solo Trip! Update: COOLING problem? :-(

If your engine runs no hotter than 180, you're fine. That could be the T-stat that's installed. My Mercs run at 175? - 180? per the specs.
 

Restless22

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Re: First Solo Trip! Update: COOLING problem? :-(

If your engine runs no hotter than 180, you're fine. That could be the T-stat that's installed. My Mercs run at 175? - 180? per the specs.

I hope you're right. I'm not with my boat right now, but I think 180 is 3/4 to the right on mine. Is yours?
 

Fireman431

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Re: First Solo Trip! Update: COOLING problem? :-(

I hope you're right. I'm not with my boat right now, but I think 180 is 3/4 to the right on mine. Is yours?

There will be a number on the temp gauge. They don't mark them like a fuel gauge. Online, I found thermostat spec temps from 160? to 175?. For safety's sake and piece of mind (and since you're new to this boat), I would recommend:

1) Find a qualified, reputable marine mechanic (ask locals). Take your boat to him and tell him your concerns. Ask him to perform a cooling system check and let him know you'd like to watch if possible, so you can learn what to look for in the future, should problems arise. You bring the beer.

2) Have him replace the raw water impeller, check the cooling system for leakdown, and flush the block.

3) Replace the thermostat with the correct one according to the specs for your boat (you didn't give me anything to work with except engine size...need year, model, carb/efi/mpi, etc)

4) Do the annual service on the boat to either locate any hidden problems or assure a good, safe boat.

A little $$ spent now on the boat will pay off dividends in the future. Nothing ruins a good day boating faster than a breakdown. Aside from that, you're also taking on the safety of everyone you put in the boat with you. Plus, you might even learn a thing or two, and that may help you save money in the future or at least pass on a little info to someone else on this forum.
 

Restless22

Petty Officer 2nd Class
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Re: First Solo Trip! Update: COOLING problem? :-(

Thanks. I think that's the route that I want to take. It will ensure peace of mind for me.

ETA: I also work for a FD. I have 20 years in this month.

Got any idea on what the evaluation/service will cost? $1000?
 

Restless22

Petty Officer 2nd Class
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Jun 6, 2012
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Re: First Solo Trip! Update: COOLING problem? :-(

Update: I met up with a former mechanic today who was a boat mechanic in Florida for many years before moving here. He has worked on our cars before, and we like and trust him.

I actually met him today through some tubes he had on Craigslist. When he began asking me what kind of boat I had, I told him about my concerns. He then told me that he still works on boats and he loves it.

So, he's going to evaluate the boat free of charge Monday!

Fate is interesting, isn't it?
 

Fireman431

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Re: First Solo Trip! Update: COOLING problem? :-(

Yes it is. Lucky you found a trustworthy mechanic.

BTW, I retired last year after 24 years. Made it to Asst. Chief and Paramedic instructor. Now it's pension time and a cold beer.
 

Restless22

Petty Officer 2nd Class
Joined
Jun 6, 2012
Messages
136
Re: First Solo Trip! Update: COOLING problem? :-(

Yes it is. Lucky you found a trustworthy mechanic.

BTW, I retired last year after 24 years. Made it to Asst. Chief and Paramedic instructor. Now it's pension time and a cold beer.

Congrats. I've made it up to Fire Marshal. I hope to make it to 35 years of service. I'll be 55.
 
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