20 Most Recent Light Outboard Motor Boat Bass Fishing Saltwater Base - Page 2 Questions & Answers

Many things you could check.

Engine to small for the boat.

Not enough fuel deliver when in full throttle.

Gas pump.

Engines compression test.

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http://www.sparkplug-crossreference.com/

Spark GAP: 1.0 mm (.039")

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Hi. Sounds like the switch in control lever. wires some time corrode . or have a look at http://boatinfo.no/lib/library.html# Hope it helps. Good luck Boatinfo The library containing manuals brochures and other technical...

Good Day Mdmd, Please send Me Additional Info. 1/Serial No 2/Horse Power 3/Is Power Trim 3 Ram Or Single Ram Unit

pull the spark plugs and see if they look like there burnning the same if so then i dought its a spark issue and if it was in the lower unit u wouldnt here a loud anything it sounds like a rod bearing i have had the same thing happen to several yamahas under a load

should go down if you are trimming down ,

your elec cmc elec tilt and trim will keep your motor from kicking up in reverse you must have a problem on the swivel bracket on the motor

Quicksilver lower gear oil at any boat store

Set the timing over revs are advance timing to far and excess rpms

A pro over haul will cost around 2000,00 includes new water pump carb rebuild plugs hoses and ect

When a motor temporarily drops a cylinder and it comes back, the problem is usually electrical. If the plugs are known to be good, checking all of the wiring connections for tightness and corrosion would be next. This includes the wire connector inside the spark plug boot. If it has points style ignition, a bad condenser or dirty/misadjusted points will cause a bad miss to. Older motors from the 50's and 60's can have the coils insulation crack and leak high voltage to the mag plate or fail completely. Testing the secondary windings with an ohm meter will let you know if the coil is still useable or not. Here's a cracked and leaking coil on a running 70's Evinrude 20 horse and some bad coils under a flywheel.

Either it's not going into gear properly or bush in propellor is faulty