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    Optimax 135 hp. Good motor???

    Hello, <br /><br />This question goes out to those people with experience with the Mercury 135hp Optimax. Are they reliable? Any specific problems with twin applications? etc. Fuel mileage? Thanks.
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    OX66 vs HPDI, Whats the difference?

    Hello,<br /> Whats the difference between these fuel injection systems? I understand the HPDI is high pressure injection which probably means a better more distributed burn in the cylinder...But, does it equal better gas mileage? Which is more reliable? It seems the better deal $$$ maybe...
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    Head Resurfacing?

    Hello, I have twin 1989 Johnsons (vro) 150's. They have been running great this season. A little history, I have had this boat for 2 years, and run carbon free with every fill up as well as decarb them twice a year. Also, I replace water pumps every year, and thermostats this past spring...
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    1989 Johnson 150's, Port motor idles hot ? Runs cool...

    Hello,<br /><br />I have twin 1989 150 Johnsons, and they run great. Here's the question. I've noticed the temp guage on the port motor runs slightly hotter then starboard motor at IDLE. Once the boat gets up on plane, the temp goes down. (The guages are old but functional) Is it normal for...
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    1989 Johnson 150 -Throttle cable rust?

    Hello,<br /><br />I have twin 1989 Johnson 150's, run great...I noticed a couple of small cracks in the throttle cable, (plastic housing/insulation). The cracks are located just before the engine cowling. It appears rust is beginning to exit through the small cracks. What is the life span of...
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    Proper Winterization/maintenance at the end of season???

    I have twin 1989 Johnson 150's. They run great, and had alot of maintenance done last march.(water pumps, thermostats, lower gear oil, plugs, and carbs cleaned) <br /><br />What would you suggest(maintenance)I do this year? They will be winterized, and lower unit oil changed. I put approx. 120...
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    vro failure rate? "disconnect or not to disconnect"?

    Hello, I periodically check this great site and find it very informative...I currently have twin 1989 Johnson 150's.(one motor rebuilt, new vro pump was installed) These engines are equipped with vro's and I've seen some posts inquiring about disconnecting the vro pump. Is the "vro" pump a...
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    150 hp engine life?

    I know this is a very broad, unscientific question..What is the AVERAGE engine life/hours for a carburated 150hp outboard engine? 1500 hours? Any imput or thoughts would be appreciated. Thank you.
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    VRO oil tanks, questions.

    Hello, I have twin Johnsons, (1989 150's vro's) and my questions are regarding the oil tanks. They sit in a closed transom, when looking down at them you see they both have a priming bulb?(which are always hard) Each have a small circular metal plate with a small metal post. Attached to the post...
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    Twin, 150 Johnsons, trolling with 1 engine?

    My question has to do with twin outboards, and trolling (6-8mph) with one engine.(alternating engines every hour) Can damage occur to the other outboard? I've heard water can be forced up the exhaust and into the motor...I would like to troll using 1 motor at a time to conserve fuel...Any...
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    low compression on 1989 Johnson 150.

    Hello, I have twin 1989 150hp Johnsons with 650 hours. The port motor has 90 or better compresion on all cylinders. The starboard motor has 90 or better on 5 cylinders, the 6th showing 60-70. These engines have been sitting for approx. 2 years. I've had the carbs cleaned, decarbonized, replaced...
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