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Old 17 February 2006, 10:34   #1
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Country: USA
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Boat name: Fat Bastard
Make: Hurricane 440,Mark2C
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Engine: Yamaha 50, Nissan 40
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1500 miles this season, and hundreds and hundreds of hours

Hello everyone,
I was wondering what kind of maintenance should be performed on my 04' 40hp 2 stroke Nissan. We used it to go from Chicago to Gulf of Mexico last season and hence it spent about 15 days running all day. About 10 hours a day. We used it for the rest of the season in fresh water and it actually has never been in salt water except when we got to the gulf. At the end of the season it seemed to be a bit down on power. What can I do myself? What should I have looked at by a mechanic?
any help would be great to get as many years as possible out of the engine.

Thanks
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Old 17 February 2006, 11:32   #2
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i would check your plugs as a starter, make sure the gaps are correct and they are in good shape, if you have done a lot of hours then just fit new ones but check the gaps first!
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Old 17 February 2006, 11:48   #3
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Quote:
Originally Posted by Hugh Jardon
i would check your plugs as a starter.....
Donít bovver after that amount of usage just fit new ones Des
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Old 17 February 2006, 16:59   #4
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We replace the plugs pretty often. I am just wondering if there is any major mechanical things we should look out for?
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Old 17 February 2006, 17:13   #5
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Dont forget temperature, humidity and atmospheric pressure will have an effect on engine performance.
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Old 17 February 2006, 17:57   #6
DJL
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Get the standard service stuff done..there should be a list in the manual.
  • Change Plugs
  • Change Gearbox Oil
  • Check/Change Anode
  • Grease all the grease nipples and linkages that need greasing
  • Remove prop, check shaft for fishing line etc, grease and replace prop.
  • Might be worth having a look at the water pump - especially if you have been using in muddy/silty water.

If its a carb model rather than the new TLDI (not sure when they were introduced) and the power is definitely down you might want to get timing/carbs checked/adjusted.
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Old 18 February 2006, 13:21   #7
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Good advice here!

In the states you can get pretty good workshop manuals by mail order, I think they are called Selec and that will have th emaintenance schedules

Full of it as usual they are calles Clymer http://www.amazon.com/exec/obidos/tg...=UTF8&v=glance
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Old 18 February 2006, 20:00   #8
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Nice! thanks guys, I'll get a shop manual right away. We thought we should replace the impeller just because of all the mud and silt we ran into. Plus we replace the gearbox oil after every major trip(a few hundred miles or so). Is the carb and timing something we can do ourselves? Also any ideas how to get a little extra juice out of the engine?
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Old 19 February 2006, 08:42   #9
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Quote:
Originally Posted by Rogan
...Is the carb and timing something we can do ourselves?
Yes, the Clymer manual will walk you through it.
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Old 21 February 2006, 06:23   #10
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Quote:
Originally Posted by Rogan
Also any ideas how to get a little extra juice out of the engine?
Hi Rogan

I beleive that the Nissan engine that you're using is branded as a Tohatsu over here. The block for the 40 and 50 are basically the same so with this in mind you might want to check out this link: http://www.zapcats.com/phpBB2/viewtopic.php?t=90

It does involve some fairly in-depth engine work but could get your pocket rocket flying even faster!!!

Hope this helps
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