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    1993 C40 ERLL Question

    Looking at motor from prop side or back of engine. On the right side have two small hoses attached to top cylinder one higher than the other. They are the same size as the pee stream hose on the port side.The higher one is right below the flywheel but still on the upper cylinder. It attaches...
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    rpm drop with less pitch prop

    Have a 13foot boston whaler with 40hp yamaha.Using a 10 1/4x15 ss cabelas high performance prop.At wot it produces 5500 rpms, right at what is recommended by yamaha and i get about 33 knots from by gps. Needed a spare prop so bought one at iboat.It is a rapture 10 1/2x13.Figured I could use it...
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    thermo unit assy Question

    Have a 1993 C40 elrr yamaha. Ordered a new thermo unit assy and when removing old unit and found some lube in and around old thermo unit assy. Looked in by manuals but can not find anything indicating applying lube when servicing or replacing unit. Does some one know what kind of lube is used if...
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    c40 2 cylinder tach Question

    Bought a yamaha anolog tach for my 1993 C40 elrr motor. The clymer`s shop manual states the following "The 6-5 hp,C25 and C40 2cylinder models have a simultaneous cdi ignition system using a single coil, 1 charge coil and 1 pulser coil. the cdi unit fires the single ignition coil with 2 spark...
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    tach question for 1993 c40 yamaha

    bought teleflex tach for my 1993 c40 2cylinder. called teleflex about where to set poles. adviced to check under fly wheel and see how many poles it had and and set to half the amount. example if it has 6p set to 3p. I have yamaha manual and cylmers but can not find how many poles my engine...
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    1993 c40 hp elrr problem

    Bought this motor about 3 months ago. First time out ran motor about a mile and had the overheat buzzer go off. Had the water pump serviced and new thermostat installed. Seemed to work ok after that, but ,noticed later that if I ran the motor around 2800 rpm the buzzer would go off. Shut motor...
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    clinking when hand spin prop

    I have 1993 c40hp yamaha. Checking prop the othr day I hand spun prop and heard clinking sound as it rotated . Could it be bearing problems? Don`t want to take boat out until I get some advice as to what could be happening. It should rotate quitely and smoothly right? lower unit is full.
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    40 hp yamaha steering Question

    I have 13`4 boston whaler with the old cable steering. The motor is a 40 hp a yamaha. Would like to change over to safer steering system. Been looking on the net. Which teleflex system would be best and safe and for my boat and motor? Also, I need a tach to monitor my 1993 40hp erll yamaha...
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    40 hp yamaha question

    Recently bought engine, buzzer went off first time out. Shut off engine until buzzer would not come on with key in on postion. Went home had water pump impeller changed out. Went out second time buzzer went off. Went home changed out thermostat.Found spring loaded pressure valve located inside...
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