Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: Correct prop for a aq125a with a 270 outdrive?

Correct prop for a aq125a with a 270 outdrive? 16 Jun 2009 03:20 #1

  • MaddMaxx129
  • MaddMaxx129's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 69
  • Thank you received: 0
Well we finally got the old 1950 bayliner to the lake for it's maiden voyage last saturday. Good news it ran like a top and didn't take on any water other than the little bit of rain we ran into while crusing.

After we pulled here out of the water we noticed that the prop had some damage to the trailing edge (nothing major....slight rolled edge). We never felt a thing while underway in the way of actually hitting something to cause the damage or any viberations either.

I guess my question is what is a good all around prop to put on the old '83 bayliner. What we are planning on doing with the boat other than just cruising around the lake is a little tubing and pulling a kneeboard. I don't know what size or pitch is on it currently but it seemed to do ok for a lack luster 4 cyl motor with 5 people onboard last weekend.

Thanks for any advice,
MaddMaxx129

Here she is deemed..."Kewl Breeze"...in all her classic '83 glory after spending a day on the lake just cruising around.

This image is hidden for guests.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

'83 1950 Bayliner Capri - Named: "Kewl Breeze"
Powered by 125A and a 270/275 Mystery Drive

Correct prop for a aq125a with a 270 outdrive? 16 Jun 2009 14:40 #2

  • Trout Slayer
  • Trout Slayer's Avatar
  • Offline
  • New Member
  • New Member
  • Posts: 38
  • Thank you received: 0
I use a 14x19 pitch prop and it works great. Good for cruising and I've pulled skiers and tubers around with a boat load of people. Top speed is about 35 mph @ 4,800 RPM. :arr

P.S. I do have a "whale tail" on my outdrive, so that may make a bit of an improvement when pulling skiers.... Just my .02

Please Log in or Create an account to join the conversation.

Hit 'n Run
1984 Capri 1950 cuddy
AQ125A/270

Correct prop for a aq125a with a 270 outdrive? 16 Jun 2009 17:58 #3

  • slia67
  • slia67's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 153
  • Thank you received: 0
When I had an '86 1950 with the same eng/drive I was running a 19 pitch also, which put the RPMs in the correct range. But one thing I did have the prop shop do was to add a little extra cup to the prop. Maybe it was my imagination but it seemed to give it a touch better hole shot.

I hope you aren't planning on replacing the prop for a little damage. Take it to a good prop shop and have them repair it. (it's much cheaper) Volvo props of that year aren't real easy to find in the aftermarket world. I bought a 2nd on eBay to have in emergencies and also to use if the other was ever in the shop being worked on.


Doug

Please Log in or Create an account to join the conversation.

Correct prop for a aq125a with a 270 outdrive? 17 Jun 2009 01:05 #4

  • MaddMaxx129
  • MaddMaxx129's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 69
  • Thank you received: 0
Thanks for all the info!

I wasn't planning on getting rid of the prop that got dinged up.....need to find a local place that can fix it though. Where is a good source for a second prop just to have around as a spare? What do I need to look for when it comes to props for the 270 outdrive such as.....number of splines....long or short shaft.....left or right hand rotation?

You say that you can turn right at 4800 with the 14x19 prop (which is the prop that the previous owner said was on it when I bought it if I remember right). The max rpm we got was right around 4K with 5 people on board but it did run well just seemed like it took a little bit to get up on plane. I realize it's only a 4 cyl and can't expect a 19' boat to "jump" out of the water from a dead stop so I'm being realistic on the performance standpoint. What I'm not sure of is that the points and timing are set correct as I got the boat from a shadetree tinkerer that couldn't leave anything alone even if it seemed to be right.

What I have done so far is new plugs and wires....didn't mess with timing or points. Points were virtually new with only a few hours use on them when I got the boat as well.

I know it seems as I'm :ouch but I like to get advice from people that have experience with the aq125a when it comes to what works and what doesn't.

YES I'm a total newbee with a classic boat :D that needed alot of love and attention to bring her back to life!

MaddMaxx129

Please Log in or Create an account to join the conversation.

'83 1950 Bayliner Capri - Named: "Kewl Breeze"
Powered by 125A and a 270/275 Mystery Drive

Correct prop for a aq125a with a 270 outdrive? 17 Jun 2009 06:34 #5

  • ishiboo
  • ishiboo's Avatar
  • Offline
  • Administrator
  • Administrator
  • Posts: 3134
  • Thank you received: 21
I have a Piranha ( http://www.piranha.com/ ) on my 270 which works well and seems to be cost effective... I believe I paid around $250 with a spare blade, and three spare blades ($60) give you what amounts to a "spare" prop. If you hit anything you replace the blades in the hub and you have a brand new prop. Also $60 in new blades to give you a full change in pitch so if you decide you need a new pitch it's fairly inexpensive to try (and you can change them out in 20 minutes.)

This image is hidden for guests.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

2005 Crownline 316 LS "The Lucille"

Correct prop for a aq125a with a 270 outdrive? 17 Jun 2009 18:07 #6

  • Trout Slayer
  • Trout Slayer's Avatar
  • Offline
  • New Member
  • New Member
  • Posts: 38
  • Thank you received: 0
Also MadMaxx, if you're going to be using the boat only for skiing & tubing with a lot of people on board, I would drop the pitch down to a 17. Check your dwell also on your points, it should be .016" (use a feeler gage). Time the engine at 10 deg. Good luck!

Please Log in or Create an account to join the conversation.

Hit 'n Run
1984 Capri 1950 cuddy
AQ125A/270

Correct prop for a aq125a with a 270 outdrive? 17 Jun 2009 18:39 #7

  • slia67
  • slia67's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 153
  • Thank you received: 0

MaddMaxx129;310677 wrote: Thanks for all the info!

The max rpm we got was right around 4K with 5 people on board but it did run well just seemed like it took a little bit to get up on plane. I realize it's only a 4 cyl and can't expect a 19' boat to "jump" out of the water from a dead stop so I'm being realistic on the performance standpoint. What I'm not sure of is that the points and timing are set correct as I got the boat from a shadetree tinkerer that couldn't leave anything alone even if it seemed to be right.



MaddMaxx129



Was that a normal load for your boat?

The first thing to do is make sure the engine is properly tuned, including making sure the tach is accurate. Then address the prop pitch. If the answer to my question above is yes and the engine is properly tuned you may want to look at moving down to a 17 pitch like Trout Slayer mentioned.

One point on Trout Slayer's post, the point gap should be 0.16" not the dwell, which is I'm sure what he meant to say.


Doug

Please Log in or Create an account to join the conversation.

Correct prop for a aq125a with a 270 outdrive? 17 Jun 2009 21:37 #8

  • MaddMaxx129
  • MaddMaxx129's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 69
  • Thank you received: 0
Doug,

I can't say as that will be a normal load for the boat.....it was the first time I had it in the water since getting it late last year. The boat is new to me but definatelly "not new".

When the girlfriends boy found out we were going to take it to the lake he decided to come along and it kind of snowballed from there.....his girlfriend and her brother wanted to come along too. I would say that a normal load would be 3 or 4 people on board. I think the prop that is on it currently will work fine for how we are planning on using the boat.

By looking at the picture is it a right or left hand prop? I would say that it is a right hand as it turns clockwise to propel the boat forward.....maybe I'm wrong (could be I'm totally new to boating).

Tried to find a prop online to replace the one that got dinged a bit but can't seem to find anything for a '83 aq270 drive......everything listed is for newer stuff.

Thanks Again,
MaddMaxx129

Please Log in or Create an account to join the conversation.

'83 1950 Bayliner Capri - Named: "Kewl Breeze"
Powered by 125A and a 270/275 Mystery Drive

Correct prop for a aq125a with a 270 outdrive? 17 Jun 2009 23:13 #9

  • 2850Bounty
  • 2850Bounty's Avatar
  • Offline
  • Platinum Member
  • Platinum Member
  • Posts: 24479
  • Thank you received: 1121
Couple of things for you to consider;

The prop shown is a RH prop.... your torque tab/trim fin is set for this propeller IF you can not feel excessive steering torque.
When/if you change to a different propeller, this will require adjustment.
Props for this drive are same spline for the 270, 275, 280, 285, 290, and the SP.

Your WOT RPM will be spec'd out in your Volvo Penta OEM manual.

This is important:
You can not do a WOT RPM test until you have fully tuned your engine!
This also involves setting your dwell with a "Dwell" meter, not by gapping the points. Point gap, in terms of a measurement, is an estimate only of proper dwell. Does it work? Yes, but it is not the correct way to set your points up.
You'll need to borrow a dwell meter if you do not own one.

Timing is another important aspect of this:
You mentioned that you have not checked this. Poor or incorrect ignition timing advance can damage an engine if too great...... so I'd recommend that you check this.
Your OEM specs will give you both a BASE advance and a TA..... (total advance).... that needs to be set/checked.
Emphasis on the importance of TA over BASE.

Secondly, and someone eluded to this for tubing and/or skiing, you should perform your WOT with the boat loaded as you intend to use it.
Setting yourself up for a propeller based on a WOT RPM test with one person on board this small boat, will give you an incorrect propeller selection for when you have five people on board...... or for when you are towing a tube, for example.
So you can see that this is important..... it may involve you having two props..... one for each type of usage. Both should be RH since you are set up for RH.
You will find a greater selection in LH props for this drive.
Change your trim fin adjustment if you go to a LH.

A good prop shop can repair this prop for you AND tell you what size it is for future.
But do this only if your WOT RPM can be reached as you intend to load/use the boat with this propeller.

Do the above, and she work well for you without over-burdening this engine.
Althoug a good place to start, I would never recommend blindly buying and using a propeller based on someone else's boat..... too many variables, IMO.


Change your drive bellows if you have not done so.
Try to store this drive in the Down position..... trailer with it UP no more than need be.

She looks like a sweet little boat..... have fun!

.

Please Log in or Create an account to join the conversation.

Rick E. Portland, Oregon
2850 Bounty Sedan Flybridge model
Twin 270 HP 5.7's w/ Closed Cooling
Volvo Penta DuoProp Drives
Kohler 4 CZ Gen Set

Correct prop for a aq125a with a 270 outdrive? 18 Jun 2009 02:26 #10

  • MaddMaxx129
  • MaddMaxx129's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 69
  • Thank you received: 0
I have already changed out the drive bellows and the water pick up hose on the outdrive as well. Probably didn't need the hose replaced but it looked like it had some age on it and while the transmission was out for drive bellows I figured might as well change it too. This boat has been a little over a 3 month project that was finally finished up for some enjoyment last weekend. Replaced or fixed the following: starter - alt belt - drive bellows - plugs - wires - fixed tilt motor - navigation lights - blower motor - bilge pump - tires/rims - bearings (cups and cones) along with new seals - all new trailer wiring (only had one light working when I brought her home). I'm pretty much finished with everything except an oil and filter change on teh motor and the final tune-up (timing and dwell).

I have gotten into the practice of lowering the drive as soon as it gets parked here at home and only up for trailering to and from the lake.

Can I switch from a RH prop to a LH prop without doing anything more than switching the shift linkage location? I'm guessing that's the procedure for switching the rotation of the prop without having the shifter operating backwards.

Thanks for the info,
MaddMaxx129

Please Log in or Create an account to join the conversation.

'83 1950 Bayliner Capri - Named: "Kewl Breeze"
Powered by 125A and a 270/275 Mystery Drive

Correct prop for a aq125a with a 270 outdrive? 18 Jun 2009 04:39 #11

  • 2850Bounty
  • 2850Bounty's Avatar
  • Offline
  • Platinum Member
  • Platinum Member
  • Posts: 24479
  • Thank you received: 1121

MaddMaxx129;311337 wrote: ........................................

  1. Can I switch from a RH prop to a LH prop without doing anything more than switching the shift linkage location?
  2. I'm guessing that's the procedure for switching the rotation of the prop without having the shifter operating backwards.

  1. When switching the vertical rod, you must center the linkage adjustment for neutral. It is not always necessary, but is a good idea to at least check it. Eccentric cylinder must be in neutral/shift handle must be in neutral! Adjust and make the rod fit that position!
  2. Yeah, you do not want the helm unit working bass ackwards. The shift cable at the drive will always "extend" for a FWD shift (regardless of LH/RH prop). The trim fin/torque tab will require re-setting to the oposite side. You will have to test drive it to know just what angle to set it to.

Please Log in or Create an account to join the conversation.

Rick E. Portland, Oregon
2850 Bounty Sedan Flybridge model
Twin 270 HP 5.7's w/ Closed Cooling
Volvo Penta DuoProp Drives
Kohler 4 CZ Gen Set
  • Page:
  • 1
Moderators: Jim GandeeRuffryder
Time to create page: 0.105 seconds
Powered by Kunena Forum