AQ131D out AQ145A in

[user-name]

Here's what I got
80 Glasply 19.5 cuddy That originally came with a mercruiser 470 Motor died.
Later on in time someone put a aq131d/SP in its place. Looks like they did a good job. But unknown hours

I've been tinkering with this motor for a while now. Ive everything set to spec. Although I have not put a compression test on yet.

Motor very hard to start when cold Once It hits you got to keep pumping the level to it running, when shes finally warm enough to stop pumping which is about 45+or- times more plus than minus .
Then you have to get her up to 2000 2200 RPM till she hits 120+ degrees and V E R Y S L O W L Y bring here down to Idle.

Now running on her own she got a slit miss & a bit more blowby that I like to see & Poor throttle responce

Played around on CL found a AQ145a with L O W hours I can pick it up for a decent price That I can live with.( dash with it, hour meter in it) Plus the drive unit

For what I understand both blocks are B23s So the R&R should be relatively easy.

Are they any swapping tricks that Ill need beware of.

 

[user-name]

Re: AQ131D out AQ145A in

Forgot Im planning on keeping the SP in there. I will have a 280 if needed.

 

[beermak]

Re: AQ131D out AQ145A in

When was the last tune up? Checked compression? Carb rebuild?
Those might cause those sympthoms and change the thermostat which might be not installed...

Id start with those simple things before an engine swap.

 

[user-name]

Re: AQ131D out AQ145A in

When was the last tune up? Checked compression? Carb rebuild?
Those might cause those sympthoms and change the thermostat which might be not installed...

Id start with those simple things before an engine swap.

TU daily
Comp havnt done it The blowby is more that I like to see
Carb rebuild probable never
TS fine

 

[bruceb58]

Re: AQ131D out AQ145A in

Yes, you need to do a compression test.

That's a pretty small motor to be putting it in a 19.5' boat!

Have you changed points(set dwell with dwell meter) and set the timing with a timing light? Using a dwell meter is pretty much mandatory on these engines.

 

[user-name]

Re: AQ131D out AQ145A in

Yes, you need to do a compression test.

That's a pretty small motor to be putting it in a 19.5' boat!

Have you changed points(set dwell with dwell meter) and set the timing with a timing light? Using a dwell meter is pretty much mandatory on these engines.

Everything has been set to spec.
New points, new condenser, new plugs, timing light at 6 degrees, points set at 32 dwell, plugs 28 IIRC
Comp test no sense in wasting more time, too much blowby. Reality the motor is a bit to small for a heavy Gasply

 

[user-name]

Re: AQ131D out AQ145A in

The motor is coming out
When pulling the out Is easier to separate at bellhousing leaving bell in boat?

or pull it out with motor.
I will be removing upper gears on outdrive so the input shaft will spinfreely

 

[bruceb58]

Re: AQ131D out AQ145A in

Pull it with the bellhousing.

 

[bruceb58]

Re: AQ131D out AQ145A in

points set at 32 dwell,

That is not the correct dwell. May be a big part of your problem. Should be 62?. You set with a dwell meter right? Not feeler gauges?

The 145 will be a little bit better but not by much.

 

[captmello]

Re: AQ131D out AQ145A in

The motor is coming out
When pulling the out Is easier to separate at bellhousing leaving bell in boat?

or pull it out with motor.
I will be removing upper gears on outdrive so the input shaft will spinfreely

I'd pull them together and replace the flywheel bearings while your at it.

This swap is interesting. The 145 is rated at 138hp, the 131 is 120hp. That's 15% more, and is perhaps the easiest and only way to get more power in your boat while using the existing outdrive. As you can tell some are skeptical about the current condition of the 131. Many people have trouble dialing in those older motor and are often running them "undertuned". But it sounds like you've been through everything, and the blowby may be a sign the engine is tired anyway. I do think a compression test is in order just to see where its at, only a 5 min job. Some mistake steam being burned off the engine from condensation as blowby, when it really isn't. We don't know you level of mechanical experience, so...

I did check the circ. water pump for the 145a and it appears to be relatively affordable compared to some of the other Volvo 4 cyl.

Oh, and what about the dwell?

If you go ahead with it, feel free to post some pics and comments on the project.

 

[user-name]

Re: AQ131D out AQ145A in

I'd pull them together and replace the flywheel bearings while your at it.

This swap is interesting. The 145 is rated at 138hp, the 131 is 120hp. That's 15% more, and is perhaps the easiest and only way to get more power in your boat while using the existing outdrive. As you can tell some are skeptical about the current condition of the 131. Many people have trouble dialing in those older motor and are often running them "undertuned". But it sounds like you've been through everything, and the blowby may be a sign the engine is tired anyway. I do think a compression test is in order just to see where its at, only a 5 min job. Some mistake steam being burned off the engine from condensation as blowby, when it really isn't. We don't know you level of mechanical experience, so...

I did check the circ. water pump for the 145a and it appears to be relatively affordable compared to some of the other Volvo 4 cyl.

Oh, and what about the dwell?

If you go ahead with it, feel free to post some pics and comments on the project.

My Level of mechanical experience.
I do my own work on my 79 f150 300-6,,, 93 W250 Cummins,,,, helped (did most of the thinking) my neighbor get his Volvo (the saint car) running after many years of sitting. I consider myself not to shabby.
When I get lost under the hood I go see my other neighbor who is a mechanic by trade.. Infact he set the dwell because I forgot how to use the dwell meter.

Flywheel bearings Didnt see that. Thank you

Circ water pump? I kind of lost on were your at on that.

Dwell angle Me bad I hit the wrong number on the key pad. dwell is set at 31 Im using my old school V8 dwell meter which means 4CYL times 2

Ill do a comp test later to day since I'll be pulling the plugs out they should fit tin the other motor

pics well see if i remember to take any

 

[Maclin]

Re: AQ131D out AQ145A in

Dwell is measured two ways, degrees or percent.

Percent is Percent no matter the number of cylinders. To convert Percent to Degrees or vice-versa the number of cylinders matters.

62% for 8 cylinders is about 28 degrees.
62% for 4 cylinders is about 56 degrees

 

[captmello]

Re: AQ131D out AQ145A in

Circ water pump? I kind of lost on were your at on that.

Sorry, in the past some of the water pumps were over 1000 to replace. So I went to look. It appears they are all around 400 now. I'm not sure what they did. I thought the worst one was the aq125, so since you're going with the aq145, a sister engine, I thought I'd look into it. Hopefully you won't need one.

 

[user-name]

Re: AQ131D out AQ145A in

Dwell is measured two ways, degrees or percent.

Percent is Percent no matter the number of cylinders. To convert Percent to Degrees or vice-versa the number of cylinders matters.

62% for 8 cylinders is about 28 degrees.
62% for 4 cylinders is about 56 degrees

Now your confusing me.



Me nor my neighbor are not full time dwell angle setters 1or2 a year for him me V A R Y rare.
This is very close to the meter I have

If I was set the points at 62Dg for the volvo were should the needle be on that face.

 

[bruceb58]

Re: AQ131D out AQ145A in

31 on the 8 cylinder scale to get the 4 cylinder dwell angle number.

For future reference, say the actual dwell you are setting it to. When you said 32 before, I had no idea that you were multiplying it by 2 to get the actual number.

I don't think I have ever seen a dwell meter that reads in percent.

 

[user-name]

Re: AQ131D out AQ145A in

Im very sorry about that Bruce

Any way I did a comp test now I getting more ticked at this motor

#1=150
#2=165
#3=160
#4=165

Not enough difference to cry about.

Now Im at plugs went to NAPA
the VOLVO book calls for bosch W6DC
But all they had was NGK BP7ES could the be wrong the set.

 

[bruceb58]

Re: AQ131D out AQ145A in

Those numbers look pretty reasonable.

Assuming your ignition is up to snuff, sounds like a fuel issue.

 

[user-name]

Re: AQ131D out AQ145A in

Those numbers look pretty reasonable.

Assuming your ignition is up to snuff, sounds like a fuel issue.

Im running on a 2gallon tank NEW gas.

Now you ready for this

I have not messed with it since sunday

Today

I took a paper towel wrapped the flame arrester held it on with a velcro strap and it started like a old chevy and
V E R Y very very very very very very little if any blowby

Im amazed

Ill look in to carb see if there are any adjustments Or what ever can be done.

 

[captmello]

Re: AQ131D out AQ145A in

The towel is acting as a choke. Those carbs have no choke. Now you have discovered a new cold starting technique!

Your compression numbers sound good.

I wouldn't hesitate to pick up a rebuild kit and go through the carb.

 

[bruceb58]

Re: AQ131D out AQ145A in

I can not claim I am expert on the carbs on those things. Could be there is junk in it and you are running lean.