How far from centerline of boat is your motor (& mount)? How far does it stand off the transom? I have plenty of clearance with mine. I can measure at some point the off-center and stand-off. cheers, John On 5/23/20 4:54 PM, Thomas Buzzi wrote:
I have a 3.5 long shaft Tohatsu and it will not swivel on a stand off mount mounted on the transom. It will either chew into the starboard quarter hull or the rudder. Of course the careful sailor never needs reverse anyway, right?🤔
On Sat, May 23, 2020 at 4:08 PM John Schinnerer via montgomery_boats <montgomery_boats@mailman.xmission.com <mailto:montgomery_boats@mailman.xmission.com>> wrote:
Thanks for that question, forgot to mention that...
The Honda 2.3 at least cannot rotate 180 degrees if mounted in the transom notch.
It can only be swiveled a rather limited amount as well, for steering/maneuvering.
A stand-off transom mount (fixed or adjustable) is needed to be able to rotate the motor for maneuvering and for reverse (180 deg rotation).
Same would be true for the Tohatsu/Mercury 3.5, as its power-head is a wee bit bulkier than the Honda 2.3.
I haven't seen the Suzuki 2.5 in person so can't say for sure. But my guess is, same situation...it can't have much smaller a power-head than the Honda since it's gotta fit about the same size motor in there. The throttle arm appears to come out on the port side in a similar location.
I would definitely recommend an adjustable mount, because: * you can keep the motor fully clear of the water when raised and tilted, even if heeling strongly to that side. * you can adjust the height (shaft depth in water) when motoring to suit wave conditions, boat loading/trim, etc. (or even a change of motor)
cheers, John
On 5/23/20 9:39 AM, Rob Bultman wrote: > For the smaller 2.3/2.5 HP motors on the M17 with the "outboard notch" in > the transom, can you swivel the motor 180 degrees into the reverse position > or is it pretty much forward only? I'm wondering if the notch will > accommodate the motor as you rotate it and if the drive end and prop will > clear the bottom of the boat. > > Thanks, > Rob > > On Thu, May 21, 2020 at 10:30 PM Dave Scobie <scoobscobie@gmail.com <mailto:scoobscobie@gmail.com>> wrote: > >> For perspective - >> >> My home, SWALLOW, is a full keeled, 8500# 25' on deck sloop and is powered >> by a Honda 8. I've never wanted more power ... just wished for an inboard >> in choppy conditions because of cavitation as SWALLOWING starts to >> hobbyhorse as the seas get big. >> >> >> :: Dave Scobie >> :: M6'8" #650 >> :: SV SWALLOW - sv-swallow.com <http://sv-swallow.com> >> :: former owner M17 #375 SWEET PEA - m17-375.com <http://m17-375.com> >> :: former owner M15 #288 SCRED - www.freewebs.com/m15-named-scred/ <http://www.freewebs.com/m15-named-scred/> >> >> >> On Thu, May 21, 2020, 7:14 PM John Schinnerer via montgomery_boats < >> montgomery_boats@mailman.xmission.com <mailto:montgomery_boats@mailman.xmission.com>> wrote: >> >>> My M17 came with a Tohatsu SailPro 6 hp extra long shaft that previous >>> owners had bought and barely used. >>> I believe it had a high-thrust prop on it also (usually standard for the >>> SailPro versions). >>> >>> It was way too much motor for that boat. Too heavy, 60+ lbs. hanging off >>> a movable mount (way too big to put in the cutout). >>> Way more thrust/HP than needed. The few times I tried it, putting it in >>> gear at idle would be almost too much thrust for maneuvering in tight >>> spaces. I could see and feel it torquing the transom. >>> I would guesstimate that about 1/3 throttle would hit hull speed. >>> >>> A friend had a Ranger 20 for a few years that came with the same motor. >>> It was overkill for that boat too (Ranger 20 has very close to same >>> displacement, waterline, and ballast as an M17). The one trip I did with >>> him in the San Juans, we had to motor back to Anacortes ramp from James >>> Island on our return day due to lack of wind. Again we never went over >>> about 1/3 throttle and were pretty much at hull speed with that. >>> >>>  From my research and other reports here (various past threads on this >>> list) I'd say a Tohatsu/Mercury 3.5 hp is plenty for an M17, for the >>> conservatives types who don't feel comfortable with a Honda 2.3 or >>> Suzuki 2.5. >>> Weighs about 25% more (43 lbs vs 31 lbs). >>> >>> But if you want reverse gear, you will have to go with 4-6hp carcass and >>> up. None of the smaller ones have reverse gear. >>> >>> As soon as you go up to a 4hp from any major brand 4-cycle, you are >>> buying the same carcass as their 6hp with strangled carb to reduce HP to >>> 4, and 60 lbs give or take a few. Or with Honda, it's just a 5hp model >>> but same weight. >>> >>> I don't know how Suzuki quality compares to Honda, but their 2.5hp is >>> about $160 cheaper than the Honda. Same weight. Water cooled, so that >>> maintenance to deal with (vs. Honda air-cooled). Fwd-Neutral shifter >>> instead of Honda's centrifugal clutch. >>> >>> cheers, >>> John >>> >>> >>> >>> On 5/21/20 1:44 PM, ejenkins1953@gmail.com <mailto:ejenkins1953@gmail.com> wrote: >>>> How big of a motor is too big for M17? I have a Volvo penta 3.9 now, >>>> seems to motor pretty well but it is an old motor. Thinking of going >>> bigger. >>>> >>>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for >>>> Windows 10 >>>> >>>> . >>>> >>>> *From: *casioqv@usermail.com <mailto:casioqv@usermail.com> <mailto:casioqv@usermail.com <mailto:casioqv@usermail.com>> >>>> *Sent: *Thursday, May 21, 2020 4:37 PM >>>> *To: *David Grah <mailto:d_b_grah@yahoo.com <mailto:d_b_grah@yahoo.com>>; For and about Montgomery >>>> Sailboats <mailto:montgomery_boats@mailman.xmission.com <mailto:montgomery_boats@mailman.xmission.com>> >>>> *Subject: *Re: M_Boats: Test results - Honda 2.3 and M17 >>>> >>>> The M15 sails to windward in pretty strong winds with the right sail >>>> setup, but 45mph is probably too much. I have made slow progress to >>>> windward in wind that was gusting to I think about 30 knots in SF Bay, >>>> under a double reefed main and small jib. I wouldn't have been able to >>>> keep the prop in the water for motoring with the shaft length on my >>>> Yamaha 2hp. >>>> >>>> Sincerely, >>>> >>>> Tyler >>>> >>>> '81 M15 #157 Defiant >>>> >>>> ----- Original Message ----- >>>> >>>> From: "For and about Montgomery Sailboats" >>>> <montgomery_boats@mailman.xmission.com <mailto:montgomery_boats@mailman.xmission.com>> >>>> >>>> To: "For and about Montgomery Sailboats" >>>> <montgomery_boats@mailman.xmission.com <mailto:montgomery_boats@mailman.xmission.com>>, john@eco-living.net <mailto:john@eco-living.net> >>>> >>>> Sent: Thursday, May 21, 2020 12:54:34 PM >>>> >>>> Subject: M_Boats: Test results - Honda 2.3 and M17 >>>> >>>> Another bit of data concerning motoring that I was reminded of this >>>> morning was when trying to motor our Montgomery 15 into strong winds on >>>> Lake Powell. The winds were forecast to gust to 45 miles per hour and, >>>> based on the amount of spray, the forecast may have been right. >>>> >>>> There wasn't a lot of fetch to get waves big so the main concern was >> the >>>> wind. Our Honda 2 horsepower wide open or close to that setting was >> able >>>> to push the boat slowly forward in these conditions but the main issue >>>> we faced was steering. If the bow fell off the wind, the rudder did not >>>> have enough authority to turn it back into the wind and, when we >> steered >>>> with the motor in addition, our progress forward slowed significantly >>>> because the thrust was diverted from forward progress to turning the >>>> boat. So instead of motoring into the wind we went downwind to a >>>> sheltered spot and stayed there overnight. >>>> >>>> I realized later the centerboard was up at the time and I have wondered >>>> if having it down would make a difference as far as ability to steer >> and >>>> therefore our ability to motor into a strong wind. Anyway, although we >>>> are sticking with our 2 horsepower motor for our Montgomery 15, there >> is >>>> something to be said for a little extra horsepower. >>>> >>>> David GrahBishop California >>>> >>> >>> -- >>> John Schinnerer - M.A., Whole Systems Design >>> -------------------------------------------- >>> - Eco-Living - >>> Whole Systems Design Services >>> People - Place - Learning - Integration >>> john@eco-living.net <mailto:john@eco-living.net> - 510.982.1334 >>> http://eco-living.net >>> http://sociocracyconsulting.com >>> >>> >>
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net <mailto:john@eco-living.net> - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com