I found this drawing online. It is for a 17. I would use a piece of 4x6 df with thru bolted eyes, one on each end and one on the opposite side in the middle. It should be a bit shorter than the length of the keel. Hang it from the crane and use 3" wide ratchet straps, one in front and one in back of the keel. You can rig it and then use the ratchets to adjust the load. I think the straps are rated at 1650# each, so they are over kill. That's OK. Lifting my boat I want over kill! I have never done this! Use at your own risk! Jon Barber Monty17 Ol'44
Jon, Unless there are spreaders between the ends of the fore and aft straps you are still exerting excess loading at the hull deck joint. There should be spreader(s) at the ends of the straps running athwartships,or a similar structure, to prevent the straps from compressing the hull and deck. fortunately the M-15 and 17 are relatively small light boats. Good Luck.have fUn. GO On Sat, Mar 26, 2022 at 12:23 PM Jon Barber <brbrbarber@gmail.com> wrote:
I found this drawing online. It is for a 17. I would use a piece of 4x6 df with thru bolted eyes, one on each end and one on the opposite side in the middle. It should be a bit shorter than the length of the keel. Hang it from the crane and use 3" wide ratchet straps, one in front and one in back of the keel. You can rig it and then use the ratchets to adjust the load. I think the straps are rated at 1650# each, so they are over kill. That's OK. Lifting my boat I want over kill!
I have never done this! Use at your own risk!
Jon Barber Monty17 Ol'44
any recommendations for a new battery? ________________________________ From: Jon Barber <brbrbarber@gmail.com> Sent: Saturday, March 26, 2022 12:23 PM To: montgomery_boats@mailman.xmission.com <montgomery_boats@mailman.xmission.com> Subject: M_Boats: M boat lifting sling I found this drawing online. It is for a 17. I would use a piece of 4x6 df with thru bolted eyes, one on each end and one on the opposite side in the middle. It should be a bit shorter than the length of the keel. Hang it from the crane and use 3" wide ratchet straps, one in front and one in back of the keel. You can rig it and then use the ratchets to adjust the load. I think the straps are rated at 1650# each, so they are over kill. That's OK. Lifting my boat I want over kill! I have never done this! Use at your own risk! Jon Barber Monty17 Ol'44
Daniel: On my M17 I used a Costco deep cycle wet lead group 24. Was 9 years old and working fine when I sold SWEET PEA. I set up most of the Sage 17s with either wet cell or AGM group 24s. Found West Marine a good option as if any problems can easy find a store for warranty support. On the second SageCat, first production boat, I set up an electrical system that used a small U-1 AGM battery. Was fine for a 3-day 'weekend' of electricity. LiFePO4 batteries are an option but require a new charging system along with battery management if you are replacing a lead type battery. Prices are dropping, reliability is increasing, and if you get the rated lifetime out of the battery are cheaper over lifetime v lead types. LiFePO4 also provided more power in less space and weight. In addition you also need to make a decision on how much power you will use, and how and how often you will regenerate power. I spent 10 weeks on my M17 and using a 30watt solar panel had plenty of electricity for my simple needs (less than 8amps used each 24 hours). :: Dave Scobie :: M6'8" #650 :: Baba 30 #233 DEJA VU :: SV SWALLOW - sv-swallow.com :: former owner M17 #375 SWEET PEA - m17-375.com :: former owner M15 #288 SCRED - m15namedscred.wordpress.com <<-- new site! On Tue, Mar 29, 2022, 10:50 AM Daniel Boyd <boyddaniel@hotmail.com> wrote:
any recommendations for a new battery? ________________________________
participants (4)
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Daniel Boyd -
Dave Scobie -
Gary H.Oberbeck -
Jon Barber