Sunday, 13 November 2011

Tohatsu, Mercury & Mariner outboards new MFS4C D S L engine test part 2

I have a little trick to get around this either fully or partially and it is performed thus: open the fuel tap but leave the vent on top of the cap closed, then hold the tiller and shake the engine from side to side vigorously for about 5 seconds, this releases gasses in the petrol and thus pressurises the fuel tank, pushing fuel through the system and filling the carb in the process. This done the cold engine will usually start 3rd pull. The new F4M from mariner outboards did exactly this and after a little initial choke it settled down for a few minutes at idle speed, it sounded fairly quiet, but no more so than the old model (of which I had one in the tank next to it for comparison) so not sure where this new induction system comes in - maybe just a sales ploy?
Ok, time to test the new fangled gearshift, tickover nice and slow, into forward gear, nice, not quite as positive as the direct gearshift handle on the side but not at all shabby, out of gear, positive again, into reverse (these have automatic reverse lockdown which is handy), all good so far. Now try to get the gears to crunch - I always do this on the tests as many laymen owners will not know to change gear quickly and positively on an outboard. A little clunking and grinding before dropping in positively, so about par for the course there. Run in at 2000rpm under load for 30 mins now, then off to the lake for a proper test!! ..... Continued in my second blog ......


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