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Author Topic:   1980 Montauk 17, 90-HP Johnson

slvr07 posted 09-19-2008 09:10 PM ET (US)
Hey guys, I'm new here and have a few questions. First I just bought a 1980 Montauk 17 that is in excellent shape. It has on it a 1999 Johnson 90-HP. My dad and I got it in the water for the first time by ourselves today. With me, him, a toolbox, two batteries, 24 gallons fuel, etc. The boat topped out at 42-MPH at 5,500-RPM. The prop says it is a 14 x 17. I was pretty happy with the speed, but I've read a few threads here and it seems several guys with similar setups are running 19-inch pitch propellers. I was just curious what size and brand props would be reccomended for my setup. The boat also has a bilge pump, and this stumped Dad-- it's a self-bailing hull. [Undecipherable]. Sorry for the long post, and I really appreciate your insights.
jimh posted 09-19-2008 09:24 PM ET (US)
[Thread was open for editing briefly--perhaps a reply was lost. Please reply again, thanks--jimh]
crabby posted 09-21-2008 01:29 PM ET (US)
You MIGHT be able to swing a 19 inch pitch prop, but I would stick with a 17 inch stainless steel wheel for best overall performance.
Bilge pump? Wouldn't be without one on my Montauk.
Tom W Clark posted 09-21-2008 03:40 PM ET (US)
The usual propellers for that boat/motor combination are the OMC/BRP SST in either the 13-3/8" x 17" or 13-7/8" x 17" sizes. The 13-7/8" x 17" Viper is identical to the latter but for it being polished instead of being painted.
The other popular propeller to use is the 13-1/4" x 15" Stiletto Advantage.
mgeiger posted 09-23-2008 08:28 AM ET (US)
I have an old aluminum 13x19 on my 86 Montauk, with an 86 Johnson 90. Top speed 44.8.
ratherwhalering posted 09-23-2008 12:06 PM ET (US)
While the hull is "self bailing" this does not mean it's entirely dry. If you pull the drain plug, you may find (depending on how much weight you have on the back of the boat) that there is 1-2 inches of standing water in the stern area. If you were to run a garden hose into the boat, it would "self bail" the excess water out, keeping equilibrium of 1-2 inches of water in the stern area.
When underway, the excess water will entirely self-bail. You must put the plug back in while underway to keep water from back flowing and re-establishing the equilibrium once you stop.
Many Montauk owners use a bilge pump, located in the sump, to manually rid the stern area of water. Instead of allowing the hull to drain while underway, then re-inserting the plug, one simply inserts the plug at the dock, pumps out the water, and begins the adventure.
Tohsgib posted 09-23-2008 12:18 PM ET (US)
Stick with a nice 17" SS prop. The 14x17 I believe is alum.
Brian7son posted 09-23-2008 12:59 PM ET (US)
Congrats on the boat. The summer before last, we picked up a 1985 Montauk with a 2001 Johnson 90-HP. You'll like the boat. It's a fun all around boat.
Check out your gas tank. The originals (I think) came with a beige colored fiberglass (a.k.a. Pate) 24 gallon tank. These tanks are not tolerant of the ethonal now found in all the fuel pumps.
I had to replace my tank several months ago. Basically, the ethonal eats away at the fiberglass tank leaving a gel slick on top of the gas in the tank, not a good thing.
Enjoy the new toy.
Hines Pointer posted 09-24-2008 06:21 PM ET (US)
This post got me curious about the prop on my '95 Johnson 90 hp V4, in part because I noticed last weekend that I was turning 51-52,000 RPM and getting 39 MPH, a bit lower and slower than in the past. I chalked it up to my having dented my skeg, and dropped the thought.
But I just went out to my garage and inspected my prop to see if I could find sizing. On the shaft between two blades I found the number 19; then, between the next two blades I found the following: 01 R&S 1496. Can someone tell me what all this means, and if the prop is properly sized?
Thanks for any help.
Tohsgib posted 09-25-2008 11:28 AM ET (US)
The 19 is the pitch and with a 17 you should spin 5400+.

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Author	Topic: 1980 Montauk 17, 90-HP Johnson
slvr07	posted 09-19-2008 09:10 PM ET (US) Hey guys, I'm new here and have a few questions. First I just bought a 1980 Montauk 17 that is in excellent shape. It has on it a 1999 Johnson 90-HP. My dad and I got it in the water for the first time by ourselves today. With me, him, a toolbox, two batteries, 24 gallons fuel, etc. The boat topped out at 42-MPH at 5,500-RPM. The prop says it is a 14 x 17. I was pretty happy with the speed, but I've read a few threads here and it seems several guys with similar setups are running 19-inch pitch propellers. I was just curious what size and brand props would be reccomended for my setup. The boat also has a bilge pump, and this stumped Dad-- it's a self-bailing hull. [Undecipherable]. Sorry for the long post, and I really appreciate your insights.
jimh	posted 09-19-2008 09:24 PM ET (US) [Thread was open for editing briefly--perhaps a reply was lost. Please reply again, thanks--jimh]
crabby	posted 09-21-2008 01:29 PM ET (US) You MIGHT be able to swing a 19 inch pitch prop, but I would stick with a 17 inch stainless steel wheel for best overall performance. Bilge pump? Wouldn't be without one on my Montauk.
Tom W Clark	posted 09-21-2008 03:40 PM ET (US) The usual propellers for that boat/motor combination are the OMC/BRP SST in either the 13-3/8" x 17" or 13-7/8" x 17" sizes. The 13-7/8" x 17" Viper is identical to the latter but for it being polished instead of being painted. The other popular propeller to use is the 13-1/4" x 15" Stiletto Advantage.
mgeiger	posted 09-23-2008 08:28 AM ET (US) I have an old aluminum 13x19 on my 86 Montauk, with an 86 Johnson 90. Top speed 44.8.
ratherwhalering	posted 09-23-2008 12:06 PM ET (US) While the hull is "self bailing" this does not mean it's entirely dry. If you pull the drain plug, you may find (depending on how much weight you have on the back of the boat) that there is 1-2 inches of standing water in the stern area. If you were to run a garden hose into the boat, it would "self bail" the excess water out, keeping equilibrium of 1-2 inches of water in the stern area. When underway, the excess water will entirely self-bail. You must put the plug back in while underway to keep water from back flowing and re-establishing the equilibrium once you stop. Many Montauk owners use a bilge pump, located in the sump, to manually rid the stern area of water. Instead of allowing the hull to drain while underway, then re-inserting the plug, one simply inserts the plug at the dock, pumps out the water, and begins the adventure.
Tohsgib	posted 09-23-2008 12:18 PM ET (US) Stick with a nice 17" SS prop. The 14x17 I believe is alum.
Brian7son	posted 09-23-2008 12:59 PM ET (US) Congrats on the boat. The summer before last, we picked up a 1985 Montauk with a 2001 Johnson 90-HP. You'll like the boat. It's a fun all around boat. Check out your gas tank. The originals (I think) came with a beige colored fiberglass (a.k.a. Pate) 24 gallon tank. These tanks are not tolerant of the ethonal now found in all the fuel pumps. I had to replace my tank several months ago. Basically, the ethonal eats away at the fiberglass tank leaving a gel slick on top of the gas in the tank, not a good thing. Enjoy the new toy.
Hines Pointer	posted 09-24-2008 06:21 PM ET (US) This post got me curious about the prop on my '95 Johnson 90 hp V4, in part because I noticed last weekend that I was turning 51-52,000 RPM and getting 39 MPH, a bit lower and slower than in the past. I chalked it up to my having dented my skeg, and dropped the thought. But I just went out to my garage and inspected my prop to see if I could find sizing. On the shaft between two blades I found the number 19; then, between the next two blades I found the following: 01 R&S 1496. Can someone tell me what all this means, and if the prop is properly sized? Thanks for any help.
Tohsgib	posted 09-25-2008 11:28 AM ET (US) The 19 is the pitch and with a 17 you should spin 5400+.