Repower for 18'SF

[baileybutt10]

Hey guys, wanted to get some opinions on a repower for a 18' SF. Found a 150 Johnson Oceanrunner, going to run compression on it this week. any input or ideas? should I stay away? is this too heavy. any help is huge. thanks

[PigSticker]

A friend of mine just repowered his 18 with a 140 Zuke 4 stroke, as have a few others, that 150 should weigh pretty close to that

[Snookerd]

The 150 will fly. It's a little lighter than the 140. Had the 150 have the 140.

[Billpotter]

Johnson 150 60 degree engines are very strong, and very thirsty if it's a carb motor- just so you know-

Good Luck!

[Snookerd]

The 2 Yamaha 130's I had on 2 different 18's were the best power to weight for the boat.

[baileybutt10]

thanks guys, really appreciate it. keeping my fingers crossed the compression test is all good. as for burning fuel, the ride is worth it.

[Beaver]

I wonder what the weight difference is between the 130 yam and the 150? I had a 6 cylinder Johnson 185 on my last boat and it was super reliable. It would push my heavy boat over 40 mph. I can only imagine how fast a 150 would push an 18 SC. The down side was it sucked gas like crazy. On my 21 Chris Craft I only got about 1.7 mpg. I now have a Tohatsu 90A (old school carb and very little electrical) on my 18 SC and I love it! I get over 3 mpg and over 30 mph with 2 guys and a boat full of gear.

[DonV]

There was a guy a few weeks ago on the Maverick Boat Co. forum, maybe a month, who had a 130 Yami for sale very nice looking engine. Might be worth looking into.

[gofastsandman]

The yamie is really a 140hp, but the factory under rated it to sell more 150s. 171kg or 376 lbs. The rude 60 degree motahs are maybe their best effort under omc. Strong and 365 lbs. Both are wonderful choices with regard to weight and balance.

[Bigshrimpin]

The 18 hull really shines at 22/23mph in rough water and 27 mph in calm water. Don't overpower it . . . just keep it light. 115/130hp yamaha is perfect. When it gets rough and you have to slow down to 18 - 22mph (doesn't matter what engine is on the back) . . . A smaller motor tends to be in a happier place along it's powerband than big heavy motor turning a 21pitch prop 2500rpm and sucking wind.