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Do you know what year pro 50 will work I'm looking to add tilt trim to my short shaft 56er

I did not deck the block I was told with my motor having 150psi if I had the head milled it would have too much compression I can not find the spec on the 50 hp head to compare 45 sst head too I...

I'm runnin 150 psi compression with a 40hp head and I'm putting a 50 hp head on it if I have it milled to 45 sst spec will I be running too much compression

I run my 40hp johnson with the waterline 2in below cab plate

Thanks for your help I'm trying to get a little more speed out of it I'm running 41 mph on a 16/48 welbuilt mod v aluminum boat I'm trying to get 45 mph out of it gonna have the head milled and...

How would you advance the timing on these would a timing light work as far as milling the head is that measurement from the bottom of the dish were the spark plug goes to the deck

What's sst45 spec

Ok do you know sst 45 spec

Is there any way to adjust the timming accurately I'm assuming it would be better to mill the head to sst 45 spec thanks for the help

I have a 99 40 hp johnson converting it to a 50 if I put a 50 hp head on it will it raise or lower the compression or do I need to have the head milled to sst 45 spec what's y'all opinions thanks for...

I know they made some 50 hp commercial motors that have large gearcase but I don't know if mid section is the same

I have 99 40hp johnson with small gearcase lower and was wondering if I could put a large gearcase on it for more prop selection if not I need a small gearcase lower cuz mine is toast

I have the 50 hp carbs and boysen reeds on my motor the other things that were different was the head carbs and exhaust tuner

Ecotrons make a 2 stroke fuel injection kit and can be used for boosted applications it's 500 dollars pretty sweet lookin setup look it up

What mild mods are you talkin bout only other thing I know would work is put a 50 hp head on and shave it thanks for your help

All considered but I'm not looking to make big power just lookin for 15 to 20 hp as for more fuel I was thinkin my stock 50hp carb has 55d main jet change to a 60d jet with a adjustable wastegate...

I have thought of an oiling system I think a windshield washer pump would work if I used thin oil like 0w 20 or or like you said the exhaust I would take the exhaust plate on the side of the motor...

I have come across some small engine turbos that will support 100 hp has anyone tried this if so what was the outcome I'm thinkin about tryin it on a 99 40 hp johnson it seems easy enough to hook it...

I was either gonna get them carbon heat treated of cyrogenicly treated dipped in liquid nitrogen to harden metal ? The 1 inch of pipe that sticks out of the midsection would there be any benefit in...

I can't find were they are sold as a set I'm goin to take the gear to a machine shop to see if they can build it up and grind it back smooth I hope they can seein how just the forward gear is 350...

I have the lower completely apart the clutch dog has alittle more wear on the forward side than the reverse the gear looks alittle worn to my shift rod is bent just a hair is this normal trying to...

Does anyone know how to adjust timing I have a 99 40hp johnson with boysen reeds and 50 hp carbs factory is 18 degree the 50hp was 19 thanks for any help

Just me in the boat weights 650lbs. it done 33 mph @ 5750 rpm with a total weight of 1150 3 others in the boat

Did a test run today 50 hp carbs really helped out and I raised the jackplate 2in @ 6000 rpm it runs 35 now I'm just waiting on a prop I have a 12.25x15 goin to a 11.75x19 so hopefully it will break...

Thanks for the part number I finally found it earlier this morning I come across a stiletto triad 2 in a 11.75x19 stainless prop for $208.95 at firstchoicemarine.com

I just got some 50 hp carbs and the part number on the intake is the same for the 40/50 for the preformance gain that the tuner will give it's not worth it to me to pull the power head right now...

With the 12.75x15 I'm turning 5750 rpm so I think the 19p prop would be good if I I'm not satisfied I'll get it worked from my research they do not make a 21p prop for a small gearcase the biggest I...

Was your motor a large or small gearcase the it have the small gearcase and the biggest prop I found was 11.75x19 it stainless if yours is a large gearcase can I run a large gearcase prop on a small...

Or we could put my tiller steer on that sst with that hydraulic jackplate

My 40 says 18 degrees on timing I might turn it to 20 degree

How would you open the exhaust tuner I not wanting to take the power head off to put a 50 tuner in I've heard of drilling some bigger holes were the exhaust come out above the cavitation plate

I've also heard of adjusting the timing to get a little hp

Dose anybody have and info bout making a 40 a 50 or 55hp I know the carbs and reed cages are different I'm not sure about the head or exhaust I put 50 hp jets and boysen reeds in it and I'm not sure...