Recent content by bobdec

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    1996 Merc 150 intermittently pegs volt meter at 17 volts.

    Engine is a 1996 150 Mercury , 2 stroke, 150 HP . 40 amp 2-regulator charging system. Dual batteries via Perko switch , problem shows running on either starting battery #1 or deep cell battery #2. Done a lot of searching but have not found any thing on an over voltage condition. I am guessing...
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    Should I use De-Carbon additives in a 2 cycle OB

    Seems since Yamaha started recommending Ring Free to be added at every fill-up, adding de-carbon additives to OB fuel has become more popular.. I personally have never used any additives in my 2 cycle OB or Waverunners. I only use R-90 (100% gas, non-ethanol) in my OB , and run E-10 (gas station...
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    Tachometer not working correctly after voltage regulators installed. o

    I have a 1996 Mercury 150 HP model 150XL serial 0G337407 . Had intermittent problem of voltage jumping up to 16-17 volts, so I replaced the two (2) 815279-4 regulators with two Caltric e-bay units with the black ground wire. After that the voltage was solid at 14.1 volts running, but the...
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    Oil drip after tilting engine up

    Did not get any responses in boating general section, thought I'd try engine specific. I have a 1996 150 HP, Mercury, 2-Cycle, 6-Cylinder, w/3 carburetors. I think it has the common problem of fuel-oil mix leaking from the carburetor bowls when engine is tilted up higher than 45*. The boat is...
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    Advise on using oil absorbent pads in outboard

    From what I have read on searches my problem is general across multiple manufactures. I have a 150 Mercury, 2-Cycle, 6-Cylinder, w/3 carburetors. It has the common problem of fuel-oil mix leaking from the carburetor bowls when engine is tilted up higher than 45*. This happens when I beach the...
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    Yamaha GP800R Idle adjustment

    Looking at the manual, shows what to adjust (stop screw to 1300 RPM) . Question, how do you get to the carbs, does the exhaust manifold on top of the the carb side have to come off. I've rebuild the top end pistons,rings, power valves the past year. So I know how to remove pieces of the exhaust...
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    1996 Mercury 150 Water Pressure test point

    Engine 1996 Mercury 150 HP Offshore SN 0G337407 . The Service manual says there is a plugged gray hose that can be used to test the cooling water pressure. Hose/fitting can also be extended to an external (dash) WP Gauge . I purchased a gauge and appropriate hose this winter in preparation to...
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    Looking for some ideas on bow modification for a windlass installation project

    First picture is my boat and current setup, the second picture is what I'd like to accomplish. I copied photo #2 off of a for sale add for another Proline. Please ignore the trolling motor as that's probably a future project after he windlass. I looking for ideas on how to convert the anchor...
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    Water pressure gauge decision Mercury outboard

    I want to add a water pressure gauge to my dash and would like feedback on what pressure range to purchase. Its a 1996 Mercury 150 HP 'Offshore'. The service manual says pressure varies from around 3 PSI at idle to +12 PSI at WOT, so I was thinking either 0-15 PSI or a 0-30 PSI gauge. What are...
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    1996 Merc 150 HP Temp climbs at low RPM loads

    Have had boat for two seasons, replaced impeller when I bought boat used and this has always happened. When running above normal 700 RPM idle speed of 4-5 MPH and going up to 10 MPH w/o planing at 1200 RPM, the engine temp starts to climb. Last year I had two ocassions to tow boats less than a...
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    What is this called ? Is there something better to use ? See pic

    The gray spiral wrapping around the cable harness to my engine is cracking and breaking in a couple of spots. See pic . What is this called and is there something better to use. I assume it's to keep cables neat and possibly prevent sun UV rays from drying up the cables !! .. By the way that...
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    Yamaha GP800 Checking piston rings w/head removed

    Busted a couple of power valves, replaced them but I still have low compression 40 lbs in #1 and 65 Lbs in #2 cylinders. Pulled head back off and nothing looks bad, no cylinder scratches, hone marks still show all around both cylinders. Put micrometer on both cyls and they are not ovaled out or...
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    Question on 2002 GP800 Power Valves breaking at stem.

    Rebuilding one of my 2002 Yamaha GP800R's. Ski Was running slower (55 MPH) than usual last season till it crapped out completly the other day. I found both power valves broken off at the base of the stem. Cyl #1 valve base was completely gone (chopped up and thrown out exhaust) and looked like...
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    Canvas Snaps - Nickle Plated Brass vs Stainless Steel

    I'm installing some removable deck carpeting and by mistake I ordered order Nickel Plated Brass snap kits instead of Stainless Steel. Both are rated for marine use, can I use the Nickle Plated, what is the real difference as far as durability in fresh water usage ?
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    Winch strap "stretching"

    Re: Winch strap "stretching" Here is a pic of my winch, safety chain and turnbuckle. All 3 to hold'er steady.
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