Prop for a 190 200hp Johnson on a 20' SF

[Iceboy149]

Cavitation plate is either right on the transom line or slightly above, maybe no more than an inch. I just put this motor that I bought apart from the hull in the same holes that were there from the factory I guess in 1983 and everything lined up. 25" shaft.

[eggsuckindog]

# 1 - Since is an older Rude DECARB DECARB - maybe twice LOL -

#2 seems like it should swing a 19 but it seems to like a 17 based on your RPM - I love the Stilletto I have, such tremendous change and so trim responsive. You can find them used on ebay too for less than 200 - 150 is great. You will have to raise the motor as stated to 1.5 to 2" above when going to an SS prop, 2 at least if you go with a stiletto or mirage. Alot of guys like the Mirage although I can't compare - I couldn't find one

#3 you really need to figure out what the alarm exactly is, your on a budegt you don't need to lose it.

The best way to explode an older OMC is NOT decarb it - the carbon builds up in the ring glands - motor will even run alot better too with more compression. My fav is Seafoam - get the lawnmower can 1 or 2 gal , follow the directions - I think they say 50/50 gas and Seafoam - 1 gal of fuel is fine. Warm it up on the muffs good - pull the fuel line off and stick it in the can and fire it up - again follow directions, run 15 mins sit 15 until gone. WARNING - have it in kinda open ground, it will smoke a tad, kinda like a peat fire - he he

call me if you have any questions - that is imperative - 813 286 8344

[Blue_Heron]

Originally Posted by eggsuckindog

I think they say 50/50 gas and Seafoam - 1 gal of fuel is fine.

I think the ratio is one can (a pint, I think) in a gallon of gas. That's the mix I use anyway.
Dave

[eggsuckindog]

Since I'm on a recent rebuild I haven't done it in awhile - so thats why I kept saying follow directions