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    Johnson 3 cyl 70 hp, 1986. No vacuum at one carburator

    Hi all, This engine idles Ok but lacks power under load. So after checking zillions of things incl. ignition, spark plugs, fuel system and compression test (even on all 3) we have found the following issue for which we have no explanation: There are 3 carbs/cylinders. Removing the air inlet...
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    Johnson 70 hp 3 cyl / 2-stroke dies when giving more throttle

    Hi folks, can't solve this one, help would be highly appreciated! Johnson 3 cyl 70 hp, 1986. Starts easy, runs well on idle and slow speed, responds well and even on throttle when not under load (when tested on land). But when throttle gets to about 50% and under load (running with my 20 foot...
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    Evinrude 70 hp 3-cyl 2stroke dies at high throttle

    I tried to find the reason for my problem for weeks now but failed.Please help! Have a 3 cyl 70 hp from 1986. It starts well, runs very well on ilde and slow speed, responds well and even on throttle when not under load ( in neutral or when tested on land). But when throttle gets to about 60%...
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