Vp aq270

[Cjp13021]

Have an 84 Bayliner Capri with VP aq 125a inboard and aq270 outdrive....just bought it a few months ago put alot of time and money getting it ready for the water....took it out today and have a few problems.....firstly, it's not going over 10 mph ....now I took the whole outdrive off and changed bellows and whatnot...possible that I have to adjust the shift cable nut more for correct speed? Or adjust the carb ? Not sure if I put it back right where it was.....another question I have is does that outdrive have to be tilted all the way down and locked in in order to reverse ? .....she pops up hard when I reverse it unless tilted all the way down and locked......also....the tilt moror holds the outboard fine when out of water .. but when in water with motor tilted up, when I put it in gear and start going the outboard drops all the way back down as soon as it starts going underload. New to boats and learning as I go but not familiar with these things.

 

[captmello]

sounds like the tilt mechanism is working properly, it is not meant to be power trim, just tilt for putting it on a trailer. you can run it tilted up at idle speed but only halfway up if needed in shallow water. I would not expect it to stay up when trailering either, put a strap on it to keep it up. and yes, needs to be fully down to reverse.
as for the lack of speed, I doubt it has anything to do with the shift cable. I would guess it's an engine issue. timing, timing belt, fuel, etc.

 

[Cjp13021]

Yeah I keep a strap on it when driving but it holds up fine unless it's underload in the water. Didn't know that it wasn't made to use as power trim. Kind of stupid design if you're in shallow water. I don't believe the lack of speed is an engine issue. Rpms about 4700 wot . When the shifter is halfway in forward gear, theres another half a turn for the throttle to go, but it does nothing going from half way mark to idle , doesn't even increase rpms...that's what made me think shift cable. It has been plugs wires coil dist cap ...compressions right where they should be....gets plenty of gas ....12 volts all the way thru the system....idk much about timing so I guess it could be that but engine sounds great so I don't believe so.... I was thinking maybe carb needed to be adjusted.

 

[Cjp13021]

Also, would it be possible to add a power trim system to this motor or would I have to do a bunch of extra stuff? Alot of these lakes around me have shallow spots and now that I know that's just a tilt for trailering I'm worried about bottoming it out.

 

[kenny nunez]

Try to get a genuine Volvo service manual for the engine and drive.
When the throttle is fully advanced is the carburetor all the way open? You may have a worn out hub in the propeller.
10 mph @ 4700 rpm is a little strange. Is the transom “flexing”,
Bayliners are known to have weak and rotting transoms.
If the plunger that contacts the suspension yoke is not fully retracted then the drive will not stay down in reverse. Keep the latch on the drive sprayed with oil.
Unfortunately you will have to find a 280 or a 290 transom setup that has the hydraulic power trim.

 

[Cjp13021]

Correction my wot is 3500 when full throttle on the water....not even really full throttle though....throttle goes up half way and that's at 3500 rpms....from halfway to full throttle it changed nothing no rpms nothing.....transom is solid no flexing ...carb opens all the way up ....someone said timing but doesn't seem like a timing issue to me she sounds great just moving slow...gets up on plane pretty good at only 10mph too so idk what it could be ....the prop does have some tiny chips but not really much....I'm gonna get a new one and see how that does but still doesn't explain why from half throttle to full throttle changes nothing at all

 

[kenny nunez]

It almost could be too much pitch on the propeller. There is a number somewhere on it. There are charts that the propeller manufacturers have that will show which one is the best for your set up.

 

[Cjp13021]

New prop and adjusted the shift cable a bit and she gets up . Takes a bit she's older butnhad her about 30-35 today on real choppy water at that . ......another issue though....couple of them.....first of all there's a loud grinding kind of rumbling noise somewhere around the engine that gets quieter when open throttle but louder at idle....maybe primary drive and bell housing bearings ? ...not sure....also....Al low rpms or real slow speed, the gauges fluctuate sometimes and the engine either tries to stall out or does stall out....but not all the time and only at low rpms ....any ideas on either of these issues ?

 

[jerryjerry05]

These 125's need the VOLVO prop.
The aftermarket ones are ok for the bigger motors not the 4cyl. Volvo's
No way to add power trim/tilt unless you change the transom brackets.That would be a HUGE job if you had the T@T from another motor.
Prop story: one of my friends had a 22ft. with a 125 He asked me to look at it as he was having trouble with acceleration and performance.
I checked everything and found nothing.
Just happened to look behind a pile of stuff and saw an old Volvo prop.
Looked and saw a new Solas prop on the drive.
Had him change it back and the problem went away.
The 125 prop needs the wide sweep that the OEM prop has.

 

[Cjp13021]

Well I did have the original volvo prop on before it just had a few small chips in it and a little bent....that was mainly my speed problem.....baby picks right up with a brand new prop ....@jerryjerry05 any thoughts on the rest of the stuff in my last comment ?

 

[kenny nunez]

Back in May 26 I explained what has to be done to get the bearing out.
I hope that the shaft is not rusted up in the flex plate. You are going to have to finally give it a try.
It appears you are good with the tools so this should not be too difficult.

 

[Cjp13021]

Well I did take it apart and try to get it out nothing would make it budge. But now that I've had it out and it's moved around alot maybe it'll be easier...I do appreciate the help guys thanks

 

[Cjp13021]

And I was thinking it was a gimbal bearing but it's different technology than gimbal must be before gimbal was widely used

 

[kenny nunez]

Volvo started with your design back in 1959 With the 100 model. Simplicity and well engineered.
If you manage to remove the shaft and bearing finding a replacement bearing is real easy. You probably could find one at a NAPA store.

 

[Cjp13021]

Yeah I have the new bearing already and the snap rings in there and everything.. .hopefully she comes out. Wish me luck.

 

[jerryjerry05]

New prop and adjusted the shift cable a bit and she gets up . Takes a bit she's older butnhad her about 30-35 today on real choppy water at that . ......another issue though....couple of them.....first of all there's a loud grinding kind of rumbling noise somewhere around the engine that gets quieter when open throttle but louder at idle....maybe primary drive and bell housing bearings ? ...not sure....also....Al low rpms or real slow speed, the gauges fluctuate sometimes and the engine either tries to stall out or does stall out....but not all the time and only at low rpms ....any ideas on either of these issues ?

Stalling: what's the rpm's at idle. 800

 

[Scott Danforth]

And I was thinking it was a gimbal bearing but it's different technology than gimbal must be before gimbal was widely used

yes, better design than the gimbal bearing. from an engineering perspective, its brilliantly simple.