Marinette Boat Forum

Ok... In fresh water this time of year... .81 reading is fine. Relax and have a cold one! Also you can check your CAPAC calibration. Most are off. It is very simple: 1. Disconnect wires from Unit. 2. Use a digital meter. 3. Hook up meter (remember you are reading negative volts not positive. 4. Comp...

You will see pitting.
Only remove paint to bate hull with stainless steel brush or aluminum oxide paper.

Exposed aluminum needs to be etched shortly after inspection.

Without stripping to bare aluminum one can not access the extent of the damage. It is obvious that something is going on..... and YES I would be concerned. Since it is so wide spread it appears that the hull has not been properly prepped and painted. No barrier coats and possible wrong bottom paint ...

I have seen the white oxidation in other aluminum boats. Most often I find it hiding under fittings. Most common source is salt oxidation. I boat that has been in salt water and salt water gets trapped under the undercoating it will oxidize the aluminum. Other chemicals can also cause the same condi...

Sounds good.

Are they approved for marine use? (fuel leak line from fuel pump plumbed into side of carb)
Also Flame arrestor?

Distributors great price!

safe boating,

dave

Yes Please check out our other posts. This topic has been covered numerous time. 1. Yes your DC grounds through the hull. On most M's you will see a grounding lug on the forward bulkhead for each engine. From there there is a direct Neg. 12 Batt. connection. It will branch off and a heavy gauge (I f...

gauges should not move with just power and engine off

check your ground

The FWD engine bulkhead is suppose to be water tight. (obviously if what gets high enough it will overflow) 1. Any breach of the bulkhead for electrical etc. should be sealed with caulk or duck putty. The main reason for this is: Prevent explosive vapor from migrating into the cabin area which is NO...

These packing glands are getting hard to find. I believe all the rudders shafts are 1" dia. http://www.foreandaftmarine.com/18-49409.htm http://www.westmarine.com/sierra--stuffing-boxes-for-pleasurecraft-inboards--P010529691 http://www.overtons.com/modperl/product/details.cgi?i=749048 I would h...

I cannot speak to the CG of a 69 Big M. In later boats 28,29, 32 bilge drain was forward in engine room center a couple of inches aft of the forward bulk head. There was also a forward bilge plug forward just aft of the V berth. This forward plug was often removed when in layup and so if it was not ...