after raising the outboard do your cavitation plate is above your bottom hull? my boat maker suggest the same but my cavitation plate will be above my bottom hull around 2cm... coz its porpoisong a lot
But what about water pressure in the power head? These experiments should ever be done without a water pressure gauge, it's the only way to know if your ruining your $10000+ outboard.
I have a water pressure gauge, was maintaining 30-35 psi, the newer Mercury lower units have water pickup ports on the lower front of the gear case bulb, acts like a low water pickup to assist the other ports.
i realise this is a older video but is the ventilation plate suppose to be even with the keel ? or is it more important to ride on top of the water ? i bought a light weight angler 22 feet with a 225 mercury 4 stroke and it is mounted on a 2 foot swim platform that rides like crap to be honest ,,,,,,,,,,,, the vent plate is way way above the keel on the blocks and way below the water while under way . ,,,,,,,,,,,, is there any standard spot that should be while at certain rpms ?
it all depends on hull type, shape, weight, setback etc... my current boat is a Tidewater 198 with a 150, the ride pad is actually level with the prop shaft, where as the boat in the video the prop shaft was about 1-1.5" below. being you have a bracket with a massive setback, you will raise you motor accordingly to obtain positive control with near optimum efficiency. rule of thumb from what I have learned is cavatation plate should be right at or just above running surface, having a constant flow over the plate is bad, light splashing but not dry is what your looking for. too high and you blow the prop out with any trim and in turns, and chance of running the water pickups dry.
In my opinion it should be above the water in a fast cruise. Plate under the water will suck your boat down. Above the water Will give you better economy and speed. Only thing you can then do is try and find the sweet spot. Don't forget to trim down in cornering though.....👍🏼
i could touch 51-52 on a perfect day and literally fumes in the gas tank, boat wants to start to chine walk in the high 40's, plus the motor doesnt have enough ass to pull any decent weight in a sea with the 19.
@@ErnestoFavor76 sadly I hit a piece of a submerged wreck that drifted into the channel and flipped, about killing myself and my Girlfriend. luckily the ol Merc restarted and hauled us and our sinking boat 4 miles back up river and it sank on the boat ramp. boat was a total loss but motor is still running to this day on a pontoon boat down in St Marks FL.
@@mikegrant8534 oh my goodness, glad you're both OK. All the best from Holland 🇳🇱 and hope you've got a new boat in the mean time. Thx again. Regards Ernst.
@@ErnestoFavor76 yes sir, insurance took care of us big time, Auto inflate life jackets and a 2000gph bilge pump saved us!!! Traded up to a 198 tidewater with a 150 and love it!
Wow that was a nice speed increase.
after raising the outboard do your cavitation plate is above your bottom hull? my boat maker suggest the same but my cavitation plate will be above my bottom hull around 2cm... coz its porpoisong a lot
Have you noticed any long term issues with having the motor "floating" rather then sitting on the transom?
No sir, boat gets run pretty hard with zero issues.
Not overheating at wot with the motor rise?
But what about water pressure in the power head? These experiments should ever be done without a water pressure gauge, it's the only way to know if your ruining your $10000+ outboard.
I have a water pressure gauge, was maintaining 30-35 psi, the newer Mercury lower units have water pickup ports on the lower front of the gear case bulb, acts like a low water pickup to assist the other ports.
Mike Grant that's great info, thanks
i realise this is a older video but is the ventilation plate suppose to be even with the keel ? or is it more important to ride on top of the water ? i bought a light weight angler 22 feet with a 225 mercury 4 stroke and it is mounted on a 2 foot swim platform that rides like crap to be honest ,,,,,,,,,,,, the vent plate is way way above the keel on the blocks and way below the water while under way . ,,,,,,,,,,,, is there any standard spot that should be while at certain rpms ?
it all depends on hull type, shape, weight, setback etc... my current boat is a Tidewater 198 with a 150, the ride pad is actually level with the prop shaft, where as the boat in the video the prop shaft was about 1-1.5" below. being you have a bracket with a massive setback, you will raise you motor accordingly to obtain positive control with near optimum efficiency. rule of thumb from what I have learned is cavatation plate should be right at or just above running surface, having a constant flow over the plate is bad, light splashing but not dry is what your looking for. too high and you blow the prop out with any trim and in turns, and chance of running the water pickups dry.
its odd that i have to trim my motor all the wat down to keep the bow down isnt that opposite ?
@@724riff No , trim down keeps the nose down and gets you on plane. Your motor is probably to low as well and will porpoise quicker that way.
In my opinion it should be above the water in a fast cruise. Plate under the water will suck your boat down. Above the water Will give you better economy and speed. Only thing you can then do is try and find the sweet spot. Don't forget to trim down in cornering though.....👍🏼
Hey Mike. Good video! Did you ever do a test with 19 pitch? curious what results were.
i could touch 51-52 on a perfect day and literally fumes in the gas tank, boat wants to start to chine walk in the high 40's, plus the motor doesnt have enough ass to pull any decent weight in a sea with the 19.
Was that Roy Orbison playing in the background?
no sir, its a band called Chevelle....hahaha, little newer than ol' Roy!
How many holes did you go up? It doesn't state that anywhere. Would be interesting to know. Thx
went from 1st hole from the top to the 4th hole from the top, so raised it 3 holes. think its was around 2-2.5"
@@mikegrant8534 great thx. Yes 1 hole is .75 inches so 2.25 inches. Thx for the info and hope its still running great.👍🏼
@@ErnestoFavor76 sadly I hit a piece of a submerged wreck that drifted into the channel and flipped, about killing myself and my Girlfriend. luckily the ol Merc restarted and hauled us and our sinking boat 4 miles back up river and it sank on the boat ramp. boat was a total loss but motor is still running to this day on a pontoon boat down in St Marks FL.
@@mikegrant8534 oh my goodness, glad you're both OK. All the best from Holland 🇳🇱 and hope you've got a new boat in the mean time. Thx again. Regards Ernst.
@@ErnestoFavor76 yes sir, insurance took care of us big time, Auto inflate life jackets and a 2000gph bilge pump saved us!!! Traded up to a 198 tidewater with a 150 and love it!
not good for waves /./