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Author Topic:   Will this prop fit my 1989, 200HP mrec?

peteinsf posted 05-31-2002 04:54 PM ET (US)
Guys,
The Mercury prop selector picked a 21 pitch for my Raider 18. I found this Laser II on ebay but the part number is different than Merc's selector. Can any look up this part number (or may own one) and tell be if it will fit my motor?
Laser II, 21 Pitch
ebay part number = 48-16516A41
Merc Prop Selector = 48-16546A46
Thanks is advance, Pete
peteinsf posted 05-31-2002 04:55 PM ET (US)
Sorry for the typos.
lhg posted 05-31-2002 05:39 PM ET (US)
Pete - that Ebay number is wrong. No such prop #. The Mercury prop selector is correct for a brand new 21 Laser. The A46 defines the hub the prop has, and style of venting, Mercury's most recent. The old A41 are the fixed vents and Merc-only hub. I am running these on my Whaler currently, #48-16546-A41.
For your reference, last year a new A46 Laser II cost me $365. I can steer you to the place if needed.
The 21 Laser on the 2.4 Merc turning 5800rpms is a 59 MPH prop. That 18 is going to fly with so much HP. Load rating is 2200-4000 lbs.
peteinsf posted 05-31-2002 06:17 PM ET (US)
Thanks Larry, I have an E-Mail in to the seller for a part number claification.
It will be intresting to see how fast she goes w/200HP. Paul @ CPD said these USMC RRC boats were at lease 500 LBS heaver then the normal CPD 18' hulls and they have very little foam in them...
peteinsf posted 06-01-2002 11:49 AM ET (US)
Ahh,
He sent me the correct A41 number but someone else got it with "buy it now" for $215...
Oh well, next time
Bigshot posted 06-03-2002 03:46 PM ET (US)
That prop is easy to find in the 21-23". I sold a nice 23" for $160. For 4215 it better be mint.
peteinsf posted 06-04-2002 02:01 PM ET (US)
Let me know if you see one for sale...
Pete
Fishcop posted 06-04-2002 06:24 PM ET (US)
Pete,
I have two stainless merc props from my old 19' OR. The numbers on the props are: 48-16316-A4-19P. I know you posted for a 21P from the merc prop selector, but thought you might be interested.
Andy.
peteinsf posted 06-04-2002 06:57 PM ET (US)
Thanks, Andy
I assume there 19 pitch? What "model" are they? (Laser, Offshore etc...)
With 200HP I think a 19 might be a bit shallow, on the other hand it's a heaver boat then a normal 18'...
Fishcop posted 06-04-2002 11:51 PM ET (US)
Pete,
Let me know where to ship it so you can see if it works. Or, I keep my boat in Richmond and I can meet you.
I think the props are Quicksilver or similar.
Andy.
lhg posted 06-05-2002 07:06 PM ET (US)
The prop being mentioned is a QSS model, later redesigned into the Vengence series.
My Mercury prop catalog says: "QSS - For increased efficiency and strength over aluminum for a wide variety of applications, QSS stainless steel props are just the ticket. QSS props are very similar in design to the standard aluminum props, but with slightly thinner blades for less drag. They are a cost efficient alternative to aluminum, particularly in faster recreational boats that can make use of higher engine trim angles."
Fishcop posted 06-06-2002 12:56 AM ET (US)
Larry,
I have a 15p Mirage Plus on my 225 Optimax on my 25'OR Cuddy. I have the motor mounted on an armstrong bracket. Full load and 4 persons gets me 42mph. WOT on a flat lake gets 45mph. In big swells, the prop tends to cavitate and when I trim the motor up, the boat bounces. I know the cuddy adds extra weight in the bow and the bracket adds flotation. Would a "fin" on the lower unit help? Would a "high five" type prop hold in the water better? Merc. prop. selector says a 17p for the "offshore" and a 19p for the fiberglass fishing. Dealer for Merc. says 15p. All my other whalers have stock transom and power. Would like your advice. What do you think?
Andy.
lhg posted 06-06-2002 07:37 PM ET (US)
Andy - I would think that with a lighter load, your boat would definitely turn a 17" pitch prop, but I would think with a full tank of gas and several persons aboard, the 15" might be better. So you may need an alternate prop. For your boat, your other option would be the 17" Offshore 4 blade. I hear they're very good, with lots of lift for a heavy (relative to HP) boat and GREAT offshore holding. Don't think it's made in 15" pitch.
The Mirage is supposed to be a good holding prop, so I'm wondering if your engine is mounted too high. With brackets, it's sometime difficult to determine. I have also noticed that the 25 with a transom bracket is
VERY sensitive to trim, so don't be alarmed about that. I can just tap the trim buttons out, and visibly see the bow instantly rise.
I run either 21" or 23" pitch Laser II's on mine, (depending on load) but Laser's are for light, fast boats (relative to the HP), which is where I am with 400HP. So I wouldn't recommend that line to you.
Fishcop posted 06-07-2002 03:03 AM ET (US)
Thanks Larry. I was in a 10'x 7sec swell yesterday and the prop seemed to come out of the water at higher rpms. I remember switching to a "high five" prop on my smaller OR and it stuck in the water no matter what. Is the after market armstrong causing the added flotation and "lifting" the prop out of the water? The boat is sweet and the merc optimax is awsome!(LOTS OF POWER)
While powering up, the motor and bracket are "digging" in the water, but at cruising speed, the motor is well out of the water.
Do your armstrong and motors sit low while getting on plane?
Your boat looks like it was made for the bracket and motors. Great attitude in the water and spacing of the motors looks great.
Thanks again,
Andy.

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Author	Topic: Will this prop fit my 1989, 200HP mrec?
peteinsf	posted 05-31-2002 04:54 PM ET (US) Guys, The Mercury prop selector picked a 21 pitch for my Raider 18. I found this Laser II on ebay but the part number is different than Merc's selector. Can any look up this part number (or may own one) and tell be if it will fit my motor? Laser II, 21 Pitch ebay part number = 48-16516A41 Merc Prop Selector = 48-16546A46 Thanks is advance, Pete
peteinsf	posted 05-31-2002 04:55 PM ET (US) Sorry for the typos.
lhg	posted 05-31-2002 05:39 PM ET (US) Pete - that Ebay number is wrong. No such prop #. The Mercury prop selector is correct for a brand new 21 Laser. The A46 defines the hub the prop has, and style of venting, Mercury's most recent. The old A41 are the fixed vents and Merc-only hub. I am running these on my Whaler currently, #48-16546-A41. For your reference, last year a new A46 Laser II cost me $365. I can steer you to the place if needed. The 21 Laser on the 2.4 Merc turning 5800rpms is a 59 MPH prop. That 18 is going to fly with so much HP. Load rating is 2200-4000 lbs.
peteinsf	posted 05-31-2002 06:17 PM ET (US) Thanks Larry, I have an E-Mail in to the seller for a part number claification. It will be intresting to see how fast she goes w/200HP. Paul @ CPD said these USMC RRC boats were at lease 500 LBS heaver then the normal CPD 18' hulls and they have very little foam in them...
peteinsf	posted 06-01-2002 11:49 AM ET (US) Ahh, He sent me the correct A41 number but someone else got it with "buy it now" for $215... Oh well, next time
Bigshot	posted 06-03-2002 03:46 PM ET (US) That prop is easy to find in the 21-23". I sold a nice 23" for $160. For 4215 it better be mint.
peteinsf	posted 06-04-2002 02:01 PM ET (US) Let me know if you see one for sale... Pete
Fishcop	posted 06-04-2002 06:24 PM ET (US) Pete, I have two stainless merc props from my old 19' OR. The numbers on the props are: 48-16316-A4-19P. I know you posted for a 21P from the merc prop selector, but thought you might be interested. Andy.
peteinsf	posted 06-04-2002 06:57 PM ET (US) Thanks, Andy I assume there 19 pitch? What "model" are they? (Laser, Offshore etc...) With 200HP I think a 19 might be a bit shallow, on the other hand it's a heaver boat then a normal 18'...
Fishcop	posted 06-04-2002 11:51 PM ET (US) Pete, Let me know where to ship it so you can see if it works. Or, I keep my boat in Richmond and I can meet you. I think the props are Quicksilver or similar. Andy.
lhg	posted 06-05-2002 07:06 PM ET (US) The prop being mentioned is a QSS model, later redesigned into the Vengence series. My Mercury prop catalog says: "QSS - For increased efficiency and strength over aluminum for a wide variety of applications, QSS stainless steel props are just the ticket. QSS props are very similar in design to the standard aluminum props, but with slightly thinner blades for less drag. They are a cost efficient alternative to aluminum, particularly in faster recreational boats that can make use of higher engine trim angles."
Fishcop	posted 06-06-2002 12:56 AM ET (US) Larry, I have a 15p Mirage Plus on my 225 Optimax on my 25'OR Cuddy. I have the motor mounted on an armstrong bracket. Full load and 4 persons gets me 42mph. WOT on a flat lake gets 45mph. In big swells, the prop tends to cavitate and when I trim the motor up, the boat bounces. I know the cuddy adds extra weight in the bow and the bracket adds flotation. Would a "fin" on the lower unit help? Would a "high five" type prop hold in the water better? Merc. prop. selector says a 17p for the "offshore" and a 19p for the fiberglass fishing. Dealer for Merc. says 15p. All my other whalers have stock transom and power. Would like your advice. What do you think? Andy.
lhg	posted 06-06-2002 07:37 PM ET (US) Andy - I would think that with a lighter load, your boat would definitely turn a 17" pitch prop, but I would think with a full tank of gas and several persons aboard, the 15" might be better. So you may need an alternate prop. For your boat, your other option would be the 17" Offshore 4 blade. I hear they're very good, with lots of lift for a heavy (relative to HP) boat and GREAT offshore holding. Don't think it's made in 15" pitch. The Mirage is supposed to be a good holding prop, so I'm wondering if your engine is mounted too high. With brackets, it's sometime difficult to determine. I have also noticed that the 25 with a transom bracket is VERY sensitive to trim, so don't be alarmed about that. I can just tap the trim buttons out, and visibly see the bow instantly rise. I run either 21" or 23" pitch Laser II's on mine, (depending on load) but Laser's are for light, fast boats (relative to the HP), which is where I am with 400HP. So I wouldn't recommend that line to you.
Fishcop	posted 06-07-2002 03:03 AM ET (US) Thanks Larry. I was in a 10'x 7sec swell yesterday and the prop seemed to come out of the water at higher rpms. I remember switching to a "high five" prop on my smaller OR and it stuck in the water no matter what. Is the after market armstrong causing the added flotation and "lifting" the prop out of the water? The boat is sweet and the merc optimax is awsome!(LOTS OF POWER) While powering up, the motor and bracket are "digging" in the water, but at cruising speed, the motor is well out of the water. Do your armstrong and motors sit low while getting on plane? Your boat looks like it was made for the bracket and motors. Great attitude in the water and spacing of the motors looks great. Thanks again, Andy.