New Volvo Owner (info needed)

[starsnstripers]

Well, gone from Mercruiser to Volvo, Looks like a nice rig. This is a 1988 Sun Runner with a Volvo 4cyl AQ 151 B and a 290-A Volvo Drive. (1) a. Is the 151 the HP rating or Cu In? b. What is the HP? (2) It has a closed cooling system would it be a half or full system? (3) Has a raw water pump on front of engine, Does the drive have one too? (4) Where this engine has an overhead cam and a timing belt, Wouldn't it be ok to take a auto engine and put freeze plugs a marine head gasket and put the cam and head on it with the marine accesories and call it good? Thats what it looks like someone did to it. I have the original Block, they cooked a piston. I know the auto yard thats painted on the block. The guy i got it from said he tryed the boat once and it started to get hot so he stoped running it put it away and now i have it. He said he didn't know if they did the impeller in that raw water pump so maybe that's what happened to the original motor. The original motor looks saveable to me. I may rebuild it anyway. as small hole on edge of one piston and a little roughness on cyl. I think a honing and new piston could do it, but i think i'm going to do a complete rebuild. However i'd like to use the boat so back to the car motor thats in it. I'd have a good start if these questions could be answered. First i'm going to pop the cover off that raw water pump and check the impeller. Thanks any of you Volvo guys.

 

[QC]

Re: New Volvo Owner (info needed)

From Volvo:

Technical data
Engine AQ151B
Production period 1985-1987
Operation 4-stroke
Cylinder configuration 4
Bore (in.) 3.78
Stroke (in.) 3.39
Compression ratio 9.7:1
Displacement (cu. in.) 152
Power (hp) 146
Max engine speed (rpm) 5500

 

[starsnstripers]

Re: New Volvo Owner (info needed)

Here's a pic of the old motor. Hopefully can be rebuilt maybe bored? These ok to bore?

 

[Howard Sterndrive]

Re: New Volvo Owner (info needed)

Is the 151 the HP rating or Cu In? b. What is the HP?

151HP I thought - but that engine has 152 cu. inches by my calculations from the bore and stroke above... I think that's coincidence

You can d/l the owners manual and spec sheets fom VP's site.

Has a raw water pump on front of engine, Does the drive have one too?

no

 

[Don S]

Re: New Volvo Owner (info needed)

If you go to this Volvo Penta link:
http://www.volvo.com/volvopenta/glo...ice/publication_search/publication_search.htm
Type in AQ151, then go to AQ151A (Nothing in B but the A is the same thing), you can download the owners manual and some product bulletins.

You can also download OEM manuals below
http://www.4shared.com/account/file/64741910/25295432/230_250_251_131151171.html for the engine

http://www.4shared.com/account/file/48536730/fa3b3311/280_to_DP-C_Drive_manual.html for the outdrive and trim.

 

[starsnstripers]

Re: New Volvo Owner (info needed)

Thankyou Don, Those are helpful. Whats the cover next to the cooling tank on the port side front of engine? is that to prime the raw water pump? Looks like it conects to the raw water system?

 

[starsnstripers]

Re: New Volvo Owner (info needed)

I found it in the manual it's access to the seawater filter. So does the raw water go through the exhaust like a haf system or is it a full system?

 

[Don S]

Re: New Volvo Owner (info needed)

Whats the cover next to the cooling tank on the port side front of engine?

Not sure what you are describing, could be the Sea Strainer (Filter for raw water). You should have the owners manual and the service manual for the engine. Both show what it is and talk about it.

 

[Don S]

Re: New Volvo Owner (info needed)

So does the raw water go through the exhaust like a haf system or is it a full system?

You find the flow diagrams in the service manual (front part) will explain that too.

 

[starsnstripers]

Re: New Volvo Owner (info needed)

Found them Don, Something not in the manual is as i said i believe they put a car motor in it, Is there is no Manual fuel pump. Someone installed an inline electric fuel pump. Hope it's going to be ok? Anyone know what the recomended fuel pressure should be and is this a safe feature? I'll look at it closer and get a name/brand of pump and if i can get the pressure from it.

 

[Don S]

Re: New Volvo Owner (info needed)

Yes, there is a mechanical fuel pump on the engine.
Page 17 of the service manual gives the pressure for the fuel pump (Feed pump in Swedish translation)
Page 36 of the SM shows a picture of the guy hooking the fuel pipe to the fuel pump.
Port side of engine under the intake manifold.
NO, you shouldn't have an electric fuel pump in the system. It's probably not hooked to an oil switch or a marine pump either. Have a look.

 

[Bondo]

Re: New Volvo Owner (info needed)

Ayuh,...
Ain't that the Same motor Volvo put into their Cars,..??..?? The B-something or rather,..??

 

[starsnstripers]

Re: New Volvo Owner (info needed)

I'm going to go look now Don, he said it was hooked to the ignition switch. And the Hole where the fuel pump goes was blocked off. I have the marine engine that came out of the boat. I'll be back with more info Don. I couldn't find the #s on the engine in the boat. I believe they put a car motor with the marine head and cam. I'll see if there a block off plate where the fuel pump goes or it's a closed off casting. BRB

 

[starsnstripers]

Re: New Volvo Owner (info needed)

OK See Attached, The mounting spot for the fuel pump is solid casting, never cut out by the factory. And the elec. fuel pump is a Mr. gasket universal for 468 cyl motors it says. It's a #12 S. It's wired to the coil so when you turn key on it feeds the pump.

 

[Bondo]

Re: New Volvo Owner (info needed)

It's wired to the coil so when you turn key on it feeds the pump.

Ayuh,... That should be run thru an oil pressure cut-off switch,....

 

[Don S]

Re: New Volvo Owner (info needed)

Sounds like you have an automotive engine. (Sorry, I never worked on a Volvo automobile so don't know anything about the automotive side)
If the mechanical fuel pump is blocked off then it may have been an automotive block. I have no idea. The electric fuel pump is probably not rated marine, and the wiring going directy to the ign. switch is definitly unsafe because it runs all the time. That could be fixe with an oil pressure switch and some wiring, no big deal. But you need a marine rated pump for safety, wired properly to cure that problem.

 

[starsnstripers]

Re: New Volvo Owner (info needed)

Yeah i asumed it was a car block and same motor it also has a casting stamp on it's side that says B-230 same as the engine that came out of the boat. I assumed it was a car motor because of the yellow paint on it that says the name of the auto junk yard it came from. I have the old motor with bad piston (see earlier attached) The motor thats in the boat has the pump bolt holes (see previous pics) can i maybe cut the hole for a manual pump? The cars have a elec fuel pump so no need for the manual hole. he fuel pressure should be 2-4 psi, Dont know what that pump is? Or if it's marine safe? Mr. Gasket universal? Doubt it.

 

[Bondo]

Re: New Volvo Owner (info needed)

Ayuh,...
I'd run a properly wired Electric,...
Long before I'd try to drill a block to mount a mechanical...

4psi is pretty standard for carbs....

 

[starsnstripers]

Re: New Volvo Owner (info needed)

thanks Bondo i've been reading your responses. Yeah you have a point. What oil switch would i need ? the pump wouldn't work until it got oil pressure, is there enough pressure to feed pump when turning over the engine? And what pump do i get? And where?

 

[Don S]

Re: New Volvo Owner (info needed)

The pump gets power from several different sources (depending on manufacturer ) but that is an easy one to overcome once we find out what you have. A normally open oil pressure switcht rated to close at about 5 to 7 psi is all you need to keep power safely to a fuel pump when the engine is running. . Auto parts stores have them. If the oil pressure goes to zero, the fuel pump stops pumping.
Merc gets power to the fuel pump when cranking from the starter solenoid.