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Salt/Freshwater Angler
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Discussion Starter · #1 ·
well most poeples engines just need to be primed and a trun of a key and they start right up. ours needs to primed and have to push the neutral botton and put the throttle 3/4 ways up for it the start. now u can imagine the loud noise it makes on a start up every single time. so what needs to be done here? maybe just some new spark plugs? btw:its a 2001 90hp johnson
thanks,
mando
 

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try moving the throttle up and back about 5 - 10 times while in neutral and then crank it. This isn't uncommon if the boat has ben sitting or if your in a shallow water boat where the motor is substantialy higher than the fuel tank outlet. Your simply having to purge out of the lines and bowls in the carbs.
 

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Mando,
How often do you use it? Do you disconnect the gas and run it all out of the engine? Do you use any stabil or other additives? When was the last time you checked the plugs?
 

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Salt/Freshwater Angler
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205 Posts
Discussion Starter · #7 ·
we dont take the boat out much maybe 1 or 2 times a month. i do the choke thing too, hold the key in and like 5 sec. later it beeps. then turn the key and it still wont kick in. ive never tried moving the throttle up and down, that might do the trick.

we've never disconnect and run it all out of the engine and we only mix oil with the gas. the engine was getting worked on a couple of weeks ago for a over heating problem and they didnt mention anything about bad plugs or anything.
 

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Warning...do not disconnect your gas line.....

Especially if your motor is oil injected. It may be OK if you premix but is still highly discouraged as the motor will run lean for a while and could cause damage. Change the plugs. If that does not help then try some good fuel additive for several tanks. If that does not help then take the motor in to have the fuel system cleaned. Oh yeah, if there is a fuel filter change it out and don't forget the airfilter if the motor has one.
 

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Might try a decarb..

I decarbed my rude this weekend. It will help with the slow starts and poor idle. You'd be surprised how much gunk you can get out of your engine. You could use sea foam deep creep or what ever they sell for mercs at the shop. Just take off the intake and let the motor warm up while on the muffs. Rev the RPM up to 2500 or so and spray about a 2 second burst into each carb until the engine starts smoking pretty good. Once the engine dies open the carb butterfly and spray the inside real good. Then remove the spark plugs and spray some in the cylinders. Let it sit for 10 minutes or so then reinstall the plugs, fire it back up and let it idle till the smoke clears.
--Hop
 
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