Starting with one star and will update when progress is made. K&C has a nice clean shop, the employees are very nice and friendly. How ever this is about an ongoing problem I am dealing with since the installation of my Yanmar 4LV 250 Diesel with ZT 370 out drive. On the first sea trial I was told that the engine has noise and vibration at idle, I accepted that and proceeded with the sea trial noticing that the engine has noise and vibration when turning left but the noise and vibration is non existent when going straight or turning right. As I have gotten familiar with the engine and drive I've noticed that the rough idle and noise / vibration are very different things that only occur when turning left in forward or reverse at low rpm. I had 2 separate sea trials. First sea trial with Colleen confirmed there is an alignment issue. I took the boat to their shop on a Friday and was called a few hours later to pick up the boat. No work was performed to check the alignment, they purged the power steering pump which had no affect on the noise and vibration and they adjusted the engine height at the motor mounts. I was told when picking up the boat that there is no way the alignment could be a problem as engine and drive bolt up together. If there is no possibility of an alignment problem why does Yanmar recommend having the alignment checked annually and at every 100 hours? Second sea trial with Paul, confirmed there is noise and vibration only when turning left at and above idle. He called the technical support manager at Boatswains locker and explained to me that the noise and vibration is from gear chatter because the amount of torque engine produces. BS. I spoke to the Tech support manager and confirmed that it is an alignment problem. Gear noise would occur if the boat is out of the water with engine running because there is no load on the propeller and gear train. I have also spoken to another Yanmar dealer that confirmed that it is an alignment problem that needs to be addressed by the company that installed the engine. As of 8/29/2025 nothing has been resolved, they will discuss the problem with Boatswains locker and get back to me. Hopefully sooner than later. Like Johann G, I'm waiting for a call from Tyler to see what their plan of action is. And I have the invoice that is billed for their first sea trial and engine alignment that never happened. Up date coming as soon as I hear something. P.S. Engine is quieter, more fuel efficient and powerful than my old Volvo 230 hp and the drive with counter rotating props has much better response than the 290Dp drive. read more

Ken is a talented & reliable guy. Helped me with my aging yacht & resolved an electrical issue w/ bilge pump. Highest recommendation. Tom read more

Still All wrong this guy Paul is a clown idk why he thinks there is or was a "friend" the only person who worked on the motors was Colleen who is not a certified Yamaha mechanic and he still doesn't know who I am I actually have 52 years of boating experience please remember when you drive into kewalo basin you see my name when you enter "Kewalo" I am Kewalo Bottom line DO NOT TRUST HIM OR HIS COMPANY TO WORK ON YAMAHAS or any of your boats. read more

K&C Marine - 10 pin plug broken on both motors at a cost of $5000 from another company they are not Yamaha certified mechanics beware - Boat Repair Near Me - Kailua, Hawaii

So I have been holding off on writing this review in the hopes that Tyler or Paul would have called me as requested. I recently had a major mechanical failure of the mounting on my 2013 mercury 115. I contacted K&C who I have used in the past. Initially the boat was I. The water and Colleen came out to do an initial assessment. She determined it would be best to look at it out of the water to better assess the repairs. I brought the boat to their shop. After a couple of weeks I received a call stating that the initial estimate would be around 6K. At that time I had an in depth discussion with Ashley regarding repair vs replace. It was decided that the engine was going to be repaired. They required a 3K deposit which was also used to purchase parts. I told them I would be out of town for a couple of weeks so they could take their time. At some point Collencw called to tell me that they had run into so issues and the final cost would be more than originally estimated. At that time she did not provide an update as to how much more. Couple more weeks go by and Ashley calls to say the boat is ready. Imagine my shock when I open the email invoice to see a total due of 9k. Minds you that is in addition to the 3K deposit. Obviously if I had know that the repairs was going to touch 13k I would have purchased a new engine. When I spoke with Ashley she confirmed that they should have been better at updating the cost. I did ask that Tyler or Paul contact me regarding the issues. To date no call from either. How does a repair double with no one informing you along the way. Props to Colleen for her hard work on the engine. She is aces. Only reason why it is not one start. read more

These guys are the best! Really kind, good people that you can trust with your machine! They will not stop helping you until your machine is up and running! I will definitely be sending all of my work to these great people! Thank you so very much to the guys at K&C! read more

Thank you K & C Marine for helping me with with the issue where I was having trouble keeping my outboard engine running. The tech was very knowledgeable verses other companies that stated I needed to replace my whole outboard engine. Ended up K & C found out it was just a bad fuel, Oil and water filter. Saved me a ton of money. Recommend this business to any boater. Excellent service!!!! Thank you K&C Marine!!! read more

outstanding support and service. I needed some Yanmar engine parts and the only business that could get them in a few days. It was a pleasure doing business with them and they made me feel like a family member. My goto parts and service guys going forward. read more