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in regular car engine use using too high a viscosity motor oil can cause oil blackening. is synthetic recommended and does the amsoil meet the manufacturer ratings? there are additives that are not for every application and synthetic can be overkill.

any theories yet on how the water got in?

the other possibility is that they never installed the push button and activated the digital meter. the toggle could be instrument lights or something else.

i think there should be a spring loaded momentary push button reset for zeroing the digital meter. maybe somebody replaced it with a toggle and wired it wrong. floscan has excellent technical support. if you get the model number for the gauge you will be able to get the wiring diagram. i...

sorry, i was talking about the fact that once you are on plane at cruising speed your prop is operating at under 70% efficiency. that seems quite low to me. i am used to seeing 85% efficiency or better, but i am also used to smaller boats with less beam and weight. for example, i would expect...

no way would i use a single starter battery for two engines. two completely autonomous starter batteries gives you redundancy. if you need more service batteries, add a 5th battery if your charging system can handle it.

yes it is a very different hull size and weight class from mine. still i would think they could be made to plane more efficiently with a resulting increase in speed even with a lower pitch prop. i would guess he needs something 15" pitch with lots of bite, but that's a guess.

how fast at 5400rpm? 22 knots = 25 mph @ 4500 gear ratio = 2:1 that seems like 31% slip.

i agree we need the actual info, but i took a (poorly) educated guess at a typical setup to illustrate the apparent problem. i did not know yamaha did a 2:1 ratio for the 250. if the ratio is 2:1 then it is 31% slip on a 15" prop which is still pretty high. if he is on a 13" prop and a 2:1...

what model yamaha 250 and what pitch prop do you have? if I assume a 15" prop pitch and 1.75 gear ratio you are getting 41% slip. that is pretty bad. it seems like you could do quite a bit to get that down by adjusting motor height and trying different props.

i like the theory that you are draining water out of the forward bulkheads because the boat is handling differently.

nice job. I hope I never go there but always good to see. how did you cut the bulkhead out?

i know they are not marine certified but I have been hugely happy with noco genius chargers and i will not use the old steel cased charger anymore unless i need a fast charge. i bought my first one when my old schulco couldn't bring back a tractor battery i thought should still work. the...

if a large auto tester gets no response they are likely dead. assuming two were deep cycle they might be saveable if you go to a battery place, but call before you make the drive. how are your batteries wired? to lose all four sounds like you don't have the service and starter batteries...

do you have speakers installed in the bow? my 223 has a round hole in the plywood in that bulkhead cut by a stereo speaker installer to provide access to the inside of that compartment. it's possible someone peeled the rubber back to do the same.

sounds like one motor may be down a cylinder. my 94 johnson 200 would rev to 4800 on 5 cylinders but the low idle was rough. it was the carb. i would start by running one engine at a time to try and isolate the issue. if it is both motors, i'd suspect bad fuel, bad ignition or batteries. if...

also, I wouldn't excavate anything out of a transom to do an epoxy based repair except for coring the thruhulls. if it is too wet epoxy is not the solution. what i am talking about is just systematic deep core holes drilled from the transom notch and from the inside to map/survey the rot...

if you are looking to avoid intrusive damage, have you consider epoxy treatment of the existing transom? it depends how soft the transom it is, but if it is a few deadspots rather than a major failure it is a whole lot less work.

i would make sure the hatch seals. my 190 has a non sealing hinged +/-18" square hatch into that area. the hatch gives good access to what i would call "damp storage" that becomes wet storage if i broach over the bow. there is a removable storage tray that fits in the hatch opening. the...

that is how you are supposed to lift a johnson/evinrude. I just looked and some v6 engines lack the three bolt holes and require a different lifting eye that is a single larger bolt with a sleeve. you will need to check yours since you don't know the year. factory omc parts are 342672 and...