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This is if any one is thinking of updating something with one of the Briggs & Stratton V twin Vanguard as have had over a year in getting one of those engines to run nearly as it should. I have one of the first now 23 year old V twin Vanguard Briggs that still runs as new and was made in Japan and few people know that, to start with the old engine seems to run on fumes and never seems to get hot, where as the new engine uses more petrol and gets very hot to such a extent it made a pretty good bird scarier if turned off. With my years of tune ears and observations said it was a Wrong’un. Symptoms were, engine oil got black black instantly and was drained by me and by them as smelt of petrol, loud harsh exhaust sound and got very hot almost instantly if ran flat out. Then if run at half to three quarter throttle sooted the left one plug with other burnt white if worked hard, If idled only short times would soot it left plug and on a cold start up would cause spitting until hot. So the a bit of a slog to get anywhere started, I got couldn’t find anything wrong and runs within PARAMETERS? and that to me says anything goes. Well engine been back twice, I think if had got it off the scrap heap would have sorted it myself, just before it went back second time again I did a simple test of removing a plug lead and fitted a spare plug so not to cause damage to ignition coil and ran it at half throttle this showed left cylinder played with the loss of the right cylinder and doing the same reversed the right cylinder was working hard, and just got some info from the US might have been the cause of cylinder difference but not the fuelling. Three weeks ago was sent a New engine, and isn’t a quick fix as has to be stripped of bits not required and built up with dual shaft drive and heat shield and back in the mower took 8hrs. Now I am not impressed the new engine is the complete opposite in that it runs very weak but is usable and with short runs isn’t going to cause issues. This is what was sent from the US, and what I say pluggs tells all, what do people think. photos of plugs the last ones I have never seen plugs burnt that clean or pink but there we will see.
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Going back the 23 years got good backup and sensible helps to a problem, and looks like the new engine might have had known ignition issues and the firm should I would have thought known this and sorted it, and fist engine also had carburettor issues especially at idle, new ones have fixed air bypass adjustments? where as the old were adjustable. The carburettor was changed on the first return and it did run much better at idle but was still running rich at half to three quarter throttle openings on light load however not right. and ran at full speed made a lots of hot air and with loud exhaust note. I was sent a comparison chart why as not of the early 2001 engine to compare they said new engines ran cooler to what, well the old engine doesn’t even get in a sweat and quieter in comparison also very miserly in fuel consumption. So have had this before to save the Planet we seem to make engines to use more fuel to generate heat. We did a side by side test, engines were shown to be cold, started and allowed to warm, temperature shown, both then ran flat out, that showed a huge difference in exhaust temperatures and looking at the plugs of the new one and its doing the same as must have been very hot indeed.
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This reply was modified 6 days, 13 hours ago by
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This reply was modified 6 days, 13 hours ago by
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This reply was modified 6 days, 13 hours ago by
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