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  1. Replies
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    i have a tohatsu 50 here in brisbane and done a...

    i have a tohatsu 50 here in brisbane and done a bit of testing with heads etc. stock should be about 130psi, either your loosing compression somewhere or your gauge is off. i had 40thou taken off my...
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    Didnt get a chance to pull the head off this...

    Didnt get a chance to pull the head off this weekend but will hopefully do it before the end of the week and post photos.

    As far as timing goes its slightly less than factory 20 degree.

    motor...
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    Revengable - No stacks but have installed them in...

    Revengable - No stacks but have installed them in the last day, mechanical pump and the cowl isnt vented more than stock

    Champ20B - Its premix and i often run a cap of metho every few tanks to...
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    seal on the thermostat is average. ill take a...

    seal on the thermostat is average.

    ill take a pic of plugs tonight and the head in a day or 2 when i take it off again to try another set of domes
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    Fred, i removed the stock shaved head to put on a...

    Fred, i removed the stock shaved head to put on a center firing head.

    this is the only picture i have of the plug and that was about 15 minutes of 75-100% throttle. motor has since done about...
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    How much power will i be losing by richening it...

    How much power will i be losing by richening it up? i have never heard of anyone running more than 135s on a mod tohatsu anywhere in the world.
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    Piston burn pattern?

    Could anyone tell me what their thoughts are on the burn deposits on the crown of my pistons. i know its far from ideal but id like to know whats causing it.

    50D2 tohatsu
    30psi more than stock...
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    mercguy - I PM'd you but no response not sure if...

    mercguy - I PM'd you but no response not sure if there is a problem with messages or not.

    Can you tell me more about the M50's that you build? are you using stock fuel pumps still, a few guys a...
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    I PM'd you mate

    I PM'd you mate
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    Thanks everyone for the info. The 98 octane is...

    Thanks everyone for the info. The 98 octane is not an E fuel its just pump gas over here in australia.
    using Valvoline mineral oil at 40:1

    Mercguy, they are the standard tohatsu jetd which are...
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    98 octune unleaded. Mineral oil run at 40:1 No...

    98 octune unleaded. Mineral oil run at 40:1

    No methanol or ethanol blend
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    my timing has been brought back 2 deg less that...

    my timing has been brought back 2 deg less that standard
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    How does this plug colour look?

    Hi guys,

    I'm not a plug reading guru by any means so looking for some info from people that know what they are looking at.

    These 2 different plugs (first copper, 2nd iridium) are new out of the...
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