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Changing TB, should I also consider... 1983 270

D

discobayken

Regular Contributor
1983 aq1125a / 270

I'm getting ready to change the Timing Belt & tensioner. Should I also consider the following while I am in there?

1. changing out the circulating water pump
2. taking apart and cleaning the heat exchanger and/or replacing seals/gaskets
3. rebuilding the alternator ?


the above systems ARE currently working but its is a 27 year old boat. I have owned it 8 years and none of the above has been done on my watch. I dont have unlimited funds... but, do I plan on taking her outside the golden gate for salmon one of these days. It would really be bad to break down out there. I want her to be reliable.

I do plan on installing a water separator in the near future.
Carb just rebuilt, electronic ignition installed with new coil, plugs, wires, rotor and cap. new starter, new battery, new raw water impeller.
Outdrive to be serviced and new bellows installed.

El P, Ricardo? anyone care to chime in here? What should I do above and beyond what I have listed to make her as reliable as possible without going overboard ? (pun intended).

Thanks!

Ken
 
Re: Changing TB, should I also consider...

Discobayken, replacing engine components as preventive maintenance may give you peace of mind. But when it comes to replacing certain Volvo Penta engine parts, it may also take a BIG dent in your finances. :eek:

Have you priced a water circulating pump for your engine? I'm sue that when you do you will change your mind about replacing it. Had you had an AQ131, an automotive pump would have worked, but when it comes to the AQ125 that's another story. Personally, I would leave the pump alone if it is working and not giving any symptoms that it is going to fail (the first one is usually leaking coolant through the telltale hole).

Nothing wrong with cleaning and (if required) re-gasketing the heat exchanger. Also, it is a good idea to replace alternator bearings and clean it internally.

If you are going to replace the belt and tensioner, make sure the timing gears are not pitted. If they show any signs og corrosion, get a new our used (from autowreckers) automotive set, as pitted gears will shorten significantly a timing belt's life.
 
Re: Changing TB, should I also consider...

I had my starter rebuilt by a local shop. While it was in there, I had them check out the alternator as well. The guy told me there was nothing wrong with the alternator but that it could use new brushes. He charged me four bucks for those and told me how to change them out. Might want to take yours in and have them check it out before you spend the bucks on a new one or rebuilding yours.
 
Re: Changing TB, should I also consider...

EL P:

Wow, about 300 bucks for that water pump. All of a sudden I kind of like the one that is in there now. I'd rather take the $300 and put it towards a kicker motor. Better insurance than a new water pump anyway.

Thanks for the tips.

Joe: I'll look into the alternator, thanks!
 
Re: Changing TB, should I also consider...

I went through the same thought process you did after buying my 1986 2150 with an AQ131A. In my case, offshore fishing for salmon will happen in Oregon and we're hoping for Desolation Sound maybe this year.

I had no history with my engine and even though it ran, I replaced my exhaust manifold, timing belt, tensioner, plugs, plug wires, distributor cap and rotor, alternator, coil, various hose clamps and rebuilt the salt water pump. After I get it running, I hope to install or have installed a Pertronix electronic ignition.

I will be replacing the bellows in the 275 outdrive and just checking it over in general and then hopefullyl, it's time for the water.

However, the point of my post is that even after all of that, I bought a new Nissan 9.8 kicker and installed a Garelick mount for it. I didn't want to spend the $2000 plus for the engine but I'm not a good enough mechanic to feel good about heading offshore on one engine.

It will be interesting to see if I really needed it.
 
Re: Changing TB, should I also consider...

film,

It sounds like we are on the same page. You might consider rebuilding the carb as well... its pretty simple and they seem to get lots of gunk in there (no filter). Also I suggest a fuel/water separator kit. Let me know how it all works out.

DBKen
 
Re: Changing TB, should I also consider...

El P, looking at that diagram I realized that I missed that jet (37) and screen. That might explain why it still runs a bit rough / hesitates at lower rpms. I got my new carb kit yesterday and will try it again. Damn. This has been a learning process.

I also thik I'm missing screw #7 altogether. What is it and where can I get that part?

Thank you!
 
Re: Changing TB, should I also consider...

By "fuel water separator kit" do you mean an inline fuel filter? I have a Sierra canister type fuel filter which I have assumed is all I need.
 
Re: Changing TB, should I also consider...

Film:

According to the seloc book.. yours is the same solex 44 PAI carb that mine has.

I bought my kit on amazon for $17.49 delivered. , sierra part 18-7099. That was the best price I found. a word of caution though... that is just the gasket kit (all I needed because I had bought a rebuild kit a while back). a rebuild kit will contain the needle valve, etc. but will cost more.

you might want to check with the experts on this to verify though....
 
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