Author Topic: V172.....Need More Power! (Read 65009 times)

74 Carlson the II · « **Reply #40 on:** December 13, 2011, 09:06:39 PM »

The tach pick up come off of the voltage regulator/ rectifier that most of the time goes to the control box and then exits from the control box to the tach in the dash. Did that deck boat have merc controll box, never mind give me a call when you get a spare moment.

David CVX-16 · « **Reply #41 on:** December 14, 2011, 04:53:47 AM »

Jason, a question for you. What hardware (bolts, nuts, washers, etc.) did you use for your motor? Mercury Marine has preferences and is very specific as to type of threads, material, etc. A good source for hardware is MacMaster Carr. They have a thick products catalog and are one of our company's fastener suppliers.

MarkS · « **Reply #42 on:** December 14, 2011, 08:44:28 AM »

I don't know if you saw it or not David, but there's a good discussion going on in the Mercury Outpost now about after-market gaskets, hardware, sealants, etc...
http://www.fiberglassics.com/glassic-forums/17-mercury-outpost/52212-after-market-gasket-sets.html#52314
Might find some useful info there as well?

Jason · « **Reply #43 on:** December 14, 2011, 09:54:45 AM »

The deck boat control box was similair to the V172. It had a seperate ignition switch. The control box only controlled the cables. Ignition switch is in the "dash".

David, I used the bolts that came out of the deck boat. SS bolts. I think 5/8 diameter. Fine thread with nylon lock nuts.

The old motor on the V172 used carrige bolts. They were steel bolts and VERY rusty. Actually, one of the heads rusted right off! I think if you use SS, fine threads, and lock nuts you would be just fine.

Back to the tach. I looked at my OLD wiring more. The crusty wire going to the upper terminal was a ground. The bottom one I am not sure. I should have paid more attention when pulling this apart.

Seems like it would of had to have been a 12V source as otherwise there would have been no power coming to the tach. So would that mean that this tach was running off the battery alone and not a "tach signal"?

Rich_V174SS · « **Reply #44 on:** December 14, 2011, 10:33:34 AM »

Quote

Back to the tach. I looked at my OLD wiring more. The crusty wire going to the upper terminal was a ground. The bottom one I am not sure. I should have paid more attention when pulling this apart. Seems like it would of had to have been a 12V source as otherwise there would have been no power coming to the tach. So would that mean that this tach was running off the battery alone and not a "tach signal"?

Check the rear face of the tach for markings as to what each terminal is for. I'm pretty sure the upper center terminal is for tach signal and the lower left is for +12v. All modern tachs require 3 connections for +12v, ground, and tach signal. My 1967 and other early Mercruiser I/O tachs were the exception to that rule and only had 2 connections for tach signal and ground.

Jason · « **Reply #45 on:** December 17, 2011, 05:45:53 PM »

Was able to pull the old boat out of the garage today and get a couple pics. Fired it up for the first time too on this boat. Ran pretty good for being so cold out. Still got more Gel-coat work to do. First couple pics are from when i pulled the old motor. you can also see my "temporary" stiffener plate.

V153 · « **Reply #46 on:** December 17, 2011, 06:10:30 PM »

Suweet! Ya that oughta pep her up a bit ...? 2 strokes love cold weather, cold water in particular. Lookin good Jason!

David CVX-16 · « **Reply #47 on:** December 17, 2011, 07:59:35 PM »

Lookin good Jason. With so many connections, it takes alot of time to make everything mesh correctly. Do you intend to run it in open water on the St. Croix yet this year?

Jason · « **Reply #48 on:** December 17, 2011, 10:56:39 PM »

I think the St. Croix is still partially open and Beanies is open while the water is open. Thinking about taking it out tomorrow. Sure hope i don't get stranded!

MarkS · « **Reply #49 on:** December 18, 2011, 06:21:38 AM »

Man, that's a LOT of motor back there Jason, looks great! Should increase the "grin factor" big time as well. Be careful out there if you do go out, it may take a little "getting used to" with that big momma on there.

Rich_V174SS · « **Reply #50 on:** December 18, 2011, 08:19:22 AM »

That's gonna be quite a bit of power hanging on there, I'm jealous!

But I need to ask - is the connecting bracket from steering cable to engine tiller OEM equipment? To me it doesn't look like it will be strong enough. I would be really careful with that.

David CVX-16 · « **Reply #51 on:** December 18, 2011, 08:21:09 AM »

Jason, I would suggest going boating on the St. Croix with another boat or telling Beanies you are going out and getting their telephone number just in case. Remember, this is the first real tryout with the new 150 HP Merc. Now I sound like a father. Good luck and give us the results of the outing.

Jerry · « **Reply #52 on:** December 18, 2011, 08:46:29 AM »

That transom's big enough for 2 of those.

Jason · « **Reply #53 on:** December 18, 2011, 11:13:24 AM »

Quote from: Rich_V174SS on December 18, 2011, 08:19:22 AM

That's gonna be quite a bit of power hanging on there, I'm jealous!
But I need to ask - is the connecting bracket from steering cable to engine tiller OEM equipment? To me it doesn't look like it will be strong enough. I would be really careful with that.

It's pretty stiff. The rod coming off the motor is not very strong either. It's not a perfect set up. On the deck boat the steering came through the rusty looking hole closer to the transom. I pulled the steering cable from the deck boat and I think I may be able to use that with my existing wheel but would need to drill a new hole through the hull to direct the cable better. We'll see how this works out first.

Jason · « **Reply #54 on:** December 18, 2011, 05:06:19 PM »

Well, I tried. Beanies is closed but the ramp is open so long as this ice does not keep you out. It was about an inch thick and went out a good 10 feet. I'll just have to wait till spring.

OleRed · « **Reply #55 on:** December 18, 2011, 05:31:27 PM »

Waah ...

I was anxious to see how that baby performs.

David CVX-16 · « **Reply #56 on:** December 18, 2011, 05:49:34 PM »

Good try Jason.

Jerry · « **Reply #57 on:** December 18, 2011, 05:58:04 PM »

There's something very wrong with having a boat on the back, and a snow plow on the front.

V153 · « **Reply #58 on:** December 18, 2011, 06:29:07 PM »

Aw c'mon man. Ya coulda busted through that ice! Heh heh heh

Ah well mebbe it's for the best. Give you time to double check everything.

Not to beat a dead horse but that steering bracket looks a lil iffy. And from what I understand, if that thing were to break it would be very difficult to control the boat ...?

Rich_V174SS · « **Reply #59 on:** December 18, 2011, 06:48:28 PM »

Touching on that steering bracket - lemme tell you a story that happened to me once while working at the boat shop. One of the other mechanics and I had to retrieve a customer's boat, a Larson 20 runabout with a Merc 175, in his seasonal slip and drive it a few miles to the launch ramp to be pulled out for storage. His helm had stripped out because the steering cable was frozen in the guide tube on the engine so there was no way to steer the boat. So, we disconnected the link at the tiller on the engine. While I sat at the driver's console I worked the throttle control, my cohort steered the engine using a deck brush pole we found in the boat. We wedged the pole between the engine's clam-shell covers between the flywheel and the top of the covers and lashed them shut around the pole with some rope. In open water I tried to open up the throttle a little and he was holding onto the makeshift tiller with all his might trying to keep the boat on course. I don't think we were able to go than 10 mph without the torque making it uncontrollable, but we eventually made it back to the launch ramp.

If that little attachment bracket on your engine fails while you're at high speed that engine is going to whip to one side from the torque and spin the boat around dangerously creating something very very bad - like all life as you know it stopping instantaneously and every molecule in your body exploding at the speed of light ...

http://www.youtube.com/watch?v=jyaLZHiJJnE