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    Air Leak?

    Hey all, Taking out my boat last weekend, I noticed a bit of a slight air whistle coming from the engine at times. I recently pulled the cylinder and water jacket covers off to replace the thermostat and cleaned up the water passages too. I scraped off the old gasket from the cover mating...
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    Stop Switch Sticking?

    Hey all... Johnson 86 model 15hp. Sometimes I can't get her to restart after shutting down. Happens only every now and then... I let it sit for a while longer and then she starts up again... I know its not fuel related and am suspecting the stop switch is sticking or staying grounded. It is...
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    Mariner Outboard Year Help!

    Hi folks, Just picked up a second hand boat with a Mariner outboard on the back... Looked up the Mercury charts but couldnt find an exact match and havent found anywhere else with charts... Anyway it is a 15Hp Long Shaft Rope Start (Made in Japan). Numbers on the plate are as follows: 15ML...
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    Powerwashing power head?

    The motor head/surrounds under the cowl are a little dirty and I want to clean it up. I have heard you can power-wash these with a high pressure hose etc (with care). Is this advisable to do? and what precautions need to be taken etc? I would re-grease all points as required following that of...
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    Zinc anode placement?

    Hi guys, Engine is a 1986 15HP Johnson. It has a zinc anode on the left side of the cav plate (if viewed from behind). I have a hydrofoil to install on the cav plate and the anode is definitely in the way! Can the anode be moved elsewhere, and is there any special requirements for where on...
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    Johnson 15hp '86 Thermostat - Two Thermo's listed?

    Hi all, another quick question. Got an '86 Johnson 15hp and the parts diagram lists two thermostats, one for early production 86 models and one for late production 86 models. I ordered a new thermostat in from the USA based on a parts list here in Oz which gave me the late model thermostat I...
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    Oil or sealer on new gaskets?

    Hi all, Just about to re-assemble the cylinder head on my 86 johnson 15hp. have new cylinder head gasket and water jacket gasket etc. Do you need to lightly oil or use any type of gasket sealant on these new gaskets when applying them?
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