Mounting engine to 15 Footer - Moderated Discussion Areas

  ContinuousWave
  Whaler
  Moderated Discussion Areas
  ContinuousWave: Whaler Repairs/Mods
  Mounting engine to 15 Footer

search | FAQ | profile | register | author help

Author Topic:   Mounting engine to 15 Footer

Eric S posted 05-01-2001 09:13 AM ET (US)
I am about to put a 70 hp Evinrude onto the 15 Whaler I have been fixing up. It looks like the lower to mounting bolts are the type that screw directly into the outboard engine bracket into threaded holes. Anybody know if this is correct.
Tom W Clark posted 05-01-2001 11:49 AM ET (US)
Eric,
That is correct. The OMC engines had a provision for when you could not through bolt to the bottom bolt slot, as on a Whaler. You use these "blind" holes by screwing the mounting bolt directly into the motor's mounting bracket. The problem with this is that once the hole is drilled in the transom you lose the ablility to raise the motor a hole or two.
I also had a 15 with a Johnson 70. It flew! It was not the fastest Whaler I've owned but it certainly seemed the fastest because you are so low to the water and because at top speed there is hardly any boat in the water and it can begin to "chine walk". I am honestly suprised it is rated for 70 hp. I cannot imagine what a 15 would be like with an 85, as AlaskaTammy claims she has in another thread.
whalernut posted 05-01-2001 05:04 PM ET (US)
I have an 85h.p. Johnson on my 73` `16 Currituck and it flies! An 85 on a `15, look out! Regards-Jack Graner,
Toad2001 posted 05-04-2001 12:47 AM ET (US)
My 15 with a 40 hp 2 stroke seems plenty fast. Initiallly I wanted to upgrade, but don't see the need to (a 50ish hp 4 stroke will be bought in a couple years when the weight/price comes down). Since they "seem" unsafe with high hp, are they? Has a BW ever had its bow catch too much air and flip like a high speed hydrofoil, or are they weighted to avoid this from happening?
Just wonderin'.
Tsuriki BW posted 05-04-2001 02:06 AM ET (US)
I have a 75hp Merc 2 stroke on my Dauntless 14. It moves very well with no handling problems at high speed. 75hp is the max rating for the boat.
Tsuriki
jameso posted 05-04-2001 08:44 AM ET (US)
I don't recommend the threaded holes, as Clark said you lose the ability to move the engine. I have a 50 Everude on my 15 it is set back 4" and will do 35/36 via gps. Fast enough for this ole boy!
SuburbanBoy posted 05-04-2001 01:35 PM ET (US)
I purchased a 4" bracket from Cabella's for about $135 or so. I had to drill two 1/2" holes in the transom side of the brackets to get it to mate up. The lower holes were too low. Now I bolt the engine to the bracket using the the normal holes on the outboard motor. Plus, I can vary height according to need (skiing or crusing etc.) Good Luck.

Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.

Author	Topic: Mounting engine to 15 Footer
Eric S	posted 05-01-2001 09:13 AM ET (US) I am about to put a 70 hp Evinrude onto the 15 Whaler I have been fixing up. It looks like the lower to mounting bolts are the type that screw directly into the outboard engine bracket into threaded holes. Anybody know if this is correct.
Tom W Clark	posted 05-01-2001 11:49 AM ET (US) Eric, That is correct. The OMC engines had a provision for when you could not through bolt to the bottom bolt slot, as on a Whaler. You use these "blind" holes by screwing the mounting bolt directly into the motor's mounting bracket. The problem with this is that once the hole is drilled in the transom you lose the ablility to raise the motor a hole or two. I also had a 15 with a Johnson 70. It flew! It was not the fastest Whaler I've owned but it certainly seemed the fastest because you are so low to the water and because at top speed there is hardly any boat in the water and it can begin to "chine walk". I am honestly suprised it is rated for 70 hp. I cannot imagine what a 15 would be like with an 85, as AlaskaTammy claims she has in another thread.
whalernut	posted 05-01-2001 05:04 PM ET (US) I have an 85h.p. Johnson on my 73` `16 Currituck and it flies! An 85 on a `15, look out! Regards-Jack Graner,
Toad2001	posted 05-04-2001 12:47 AM ET (US) My 15 with a 40 hp 2 stroke seems plenty fast. Initiallly I wanted to upgrade, but don't see the need to (a 50ish hp 4 stroke will be bought in a couple years when the weight/price comes down). Since they "seem" unsafe with high hp, are they? Has a BW ever had its bow catch too much air and flip like a high speed hydrofoil, or are they weighted to avoid this from happening? Just wonderin'.
Tsuriki BW	posted 05-04-2001 02:06 AM ET (US) I have a 75hp Merc 2 stroke on my Dauntless 14. It moves very well with no handling problems at high speed. 75hp is the max rating for the boat. Tsuriki
jameso	posted 05-04-2001 08:44 AM ET (US) I don't recommend the threaded holes, as Clark said you lose the ability to move the engine. I have a 50 Everude on my 15 it is set back 4" and will do 35/36 via gps. Fast enough for this ole boy!
SuburbanBoy	posted 05-04-2001 01:35 PM ET (US) I purchased a 4" bracket from Cabella's for about $135 or so. I had to drill two 1/2" holes in the transom side of the brackets to get it to mate up. The lower holes were too low. Now I bolt the engine to the bracket using the the normal holes on the outboard motor. Plus, I can vary height according to need (skiing or crusing etc.) Good Luck.